Updated on 2024/03/28

写真a

 
KORO Kazuhiro
 
Organization
Academic Assembly Institute of Science and Technology SEISAN DESIGN KOUGAKU KEIRETU Professor
Faculty of Engineering Professor
Graduate School of Science and Technology Environmental Science and Technology Architecture and Civil Engineering Professor
Title
Professor
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Degree

  • 博士(工学) ( 2002.3   新潟大学 )

  • 修士(工学) ( 1999.3   新潟大学 )

Research Interests

  • Enhancement of computational efficiency on boundary element analysis

  • Wheel-track vibration analysis

  • FE-based simulation of ballast settlement

  • Homogenization of heterogeneous media with material and/or shape uncertainty

  • Stochastic simulation of dynamic problems in railway engineering

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Structure engineering and earthquake engineering  / Computational Mechanics

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials  / Computational Mechanics

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Structure engineering and earthquake engineering  / Applied Mechanics

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Structure engineering and earthquake engineering  / Railway Mechanics

Research History (researchmap)

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture and Civil Engineering   Professor

    2017.4

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  • Niigata University   Faculty of Engineering Department of Engineering   Professor

    2017.4

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  • Niigata University   College of Creative Studies Creative Studies Course   Professor

    2017.4 - 2021.3

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  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture and Civil Engineering   Associate Professor

    2010.4 - 2017.3

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  • Niigata University   Faculty of Engineering Department of Civil Engineering and Architecture Civil Engineering   Associate Professor

    2007.4 - 2017.3

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  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Associate Professor

    2007.4 - 2010.3

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  • Niigata University   Faculty of Engineering Department of Civil Engineering and Architecture Civil Engineering   Associate Professor (as old post name)

    2005.11 - 2007.3

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  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Associate Professor (as old post name)

    2005.11 - 2007.3

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  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Assistant

    2004.4 - 2005.10

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  • Niigata University   Faculty of Engineering Department of Civil Engineering and Architecture Civil Engineering   Assistant

    2003.6 - 2005.10

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  • Niigata University   Graduate School of Science and Technology Environmental Management Science   Assistant

    2003.6 - 2004.3

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Research History

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture and Civil Engineering   Professor

    2017.4

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    Country:Japan

  • Niigata University   Faculty of Engineering Department of Engineering   Professor

    2017.4

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    Country:Japan

  • Niigata University

    2023.4

  • Niigata University

    2023.4

  • Niigata University

    2022.10

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    Country:Japan

  • Niigata University   Professor

    2022.10 - 2023.3

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    Country:Japan

  • Niigata University   Professor

    2022.4 - 2022.9

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    Country:Japan

  • Niigata University

    2021.12 - 2022.9

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    Country:Japan

  • Niigata University   College of Creative Studies Creative Studies Course   Professor

    2017.4 - 2021.3

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture and Civil Engineering   Associate Professor

    2010.4 - 2017.3

  • Niigata University   Department of Civil Engineering & Architecture, Civil Engineering Course   Associate Professor

    2007.4 - 2017.3

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Associate Professor

    2007.4 - 2010.3

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Associate Professor (as old post name)

    2005.11 - 2007.3

  • Niigata University   Department of Civil Engineering & Architecture, Civil Engineering Course   Associate Professor (as old post name)

    2005.11 - 2007.3

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology Architecture, Civil Engineering and Urban Design   Research Assistant

    2004.4 - 2005.10

  • Niigata University   Department of Civil Engineering & Architecture, Civil Engineering Course   Research Assistant

    2003.6 - 2005.10

  • Niigata University   Graduate School of Science and Technology Environmental Management Science   Research Assistant

    2003.6 - 2004.3

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Education

  • Niigata University   Graduate School, Division of Science and Technology   環境管理科学専攻

    - 2002.3

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    Country: Japan

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Professional Memberships

Committee Memberships

  • JSCE   Kanto division, vice secretary general  

    2020.5 - 2022.5   

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  • JSCE   Journal of JSCE, A1, Editor  

    2019.6 - 2021.5   

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    Committee type:Academic society

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  • 日本計算数理工学会   理事  

    2018.4   

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    Committee type:Academic society

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  • 土木学会   応用力学委員会幹事長  

    2015.10 - 2017.9   

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    Committee type:Academic society

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  • 日本計算工学会   代表会員  

    2014.4   

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    Committee type:Academic society

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  • 土木学会   構造工学委員会 構造工学論文集編集小委員会 計算力学・材料力学部門主査  

    2012.5 - 2013.4   

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    Committee type:Academic society

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  • 土木学会   構造工学委員会 構造工学論文集編集小委員会 計算力学・材料力学部門副査  

    2010.4 - 2012.5   

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    Committee type:Academic society

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  • 土木学会   構造工学委員会 構造工学論文集編集小委員会 計算力学・材料力学部門分科会委員  

    2007.9 - 2010.4   

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    Committee type:Academic society

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  • 土木学会   応用力学委員会委員  

    2006.1   

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  • 土木学会   応用力学委員会論文集編集小委員会委員(計算力学部門副査)  

    2006.1 - 2017.12   

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    Committee type:Academic society

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  •   新潟県環境審議会副会長  

    2023.6   

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    Committee type:Municipal

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  • 土木学会   関東支部企画部会委員  

    2022.5   

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    Committee type:Academic society

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  •   国土交通省北陸地方整備局総合評価審査委員会委員長  

    2021.4   

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    Committee type:Government

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  •   土木学会全国大会委員会委員(関東支部委員)  

    2020.12 - 2022.5   

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    Committee type:Academic society

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  •   新潟市大規模建設事業評価監視委員会委員長  

    2019.10   

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    Committee type:Municipal

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  •   新潟県環境審議会委員  

    2019.6 - 2023.5   

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    Committee type:Municipal

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  •   国土交通省北陸地方整備局総合評価審査委員会委員  

    2019.5 - 2021.3   

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    Committee type:Government

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  • レール・車輪接触力学研究会   レール・車輪系の協調による最適化と課題解決WG委員  

    2018.7   

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    Committee type:Academic society

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  •   国土交通省北陸建設界の担い手確保・育成推進協議会委員  

    2018.4   

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    Committee type:Government

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  •   新潟市水道局経営審議会会長  

    2017.10   

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    Committee type:Municipal

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  • 土木学会   J-RAIL2017実行委員会委員  

    2017.6 - 2018.2   

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    Committee type:Academic society

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  • 土木学会   関東支部新潟会幹事  

    2017.4   

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    Committee type:Academic society

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  •   国土交通省北陸地方整備局総合評価審査委員会河川部会委員  

    2016.4 - 2021.3   

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    Committee type:Government

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  • 土木学会   応用力学委員会計算力学小委員会副委員長  

    2016.4 - 2018.3   

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    Committee type:Academic society

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  • 日本計算工学会   計算工学講演会実行委員会委員  

    2015.9 - 2022.9   

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    Committee type:Academic society

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  • 土木学会   J-RAIL2014実行委員会委員  

    2014.6 - 2014.12   

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    Committee type:Academic society

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  • 日本計算工学会   評議員  

    2012.5 - 2014.3   

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    Committee type:Academic society

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  • 土木学会   応用力学委員会計算力学小委員会幹事長  

    2011.12 - 2016.3   

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    Committee type:Academic society

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  • 土木学会   土木学会(応用力学委員会イノベーション推進小委員会委員)  

    2011.10 - 2013.9   

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    Committee type:Academic society

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  • 土木学会   応用力学委員会応用力学ウィキペディア小委員会委員  

    2010.4 - 2015.9   

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    Committee type:Academic society

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  •   国土交通省北陸地方整備局下越・小国・会津ブロック総合評価審査委員会委員  

    2009.4 - 2017.3   

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    Committee type:Government

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  • 土木学会   関東支部幹事  

    2009.4 - 2011.3   

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    Committee type:Academic society

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  • 日本計算工学会   計算工学講演会実行委員会委員  

    2008.9 - 2013.9   

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  • 土木学会   教育企画・人材育成委員会 エンジニアリングデザイン教育小委員会委員  

    2007.10 - 2009.9   

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    Committee type:Academic society

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  • 日本計算数理工学会   評議員  

    2005.4 - 2018.3   

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  • 土木学会   応用力学委員会計算力学小委員会幹事  

    2005.4 - 2011.11   

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    Committee type:Academic society

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  • 土木学会   関東支部幹事  

    2005.4 - 2007.3   

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    Committee type:Academic society

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  • 土木学会   関東支部新潟会幹事  

    2004.4 - 2011.3   

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    Committee type:Academic society

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  • 日本計算数理工学会   委員  

    2004.4 - 2005.4   

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    Committee type:Academic society

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  • 土木学会   応用力学委員会計算力学小委員会委員  

    2003.9   

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Papers

  • Influence of spatial variations of several parameters of rail on wheel-track dynamic response Reviewed

    Koro,K, Abe, K

    79 ( 15 )   22-15027   2023.2

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • FE-based simulation method for ballast settlement simulation in consideration of spatial variation of several material parameters Reviewed

    Koro, K, Abe, K

    26   259 - 266   2022.7

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  • FE-based simulation method for ballast settlement of curved track in consideration of track vibration Reviewed

    Inoue, S, Koro, K

    26   145 - 152   2022.7

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  • A STUDY ON POSSIBILITY OF PREDICTION OF TRACK BUCKLING BASED ON ESTIMATED LATERAL ALIGNMENT Reviewed

    Kenta NAKATA, Kazuhisa ABE, Kazuhiro KORO

    Journal of Railway Engineering, JSCE   26   89 - 96   2022.7

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  • INFLUENCE OF PAD DAMPING ON TRACK DISPERSION CURVES Reviewed

    Kazuhisa ABE, Shota HAKAMADA, Kazuhiro KORO

    Journal of Railway Engineering, JSCE   26   267 - 274   2022.7

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  • FE-based simulation method on wheel-track vibration of jointed railway track with grid-type sleepers Reviewed

    Koro, K, Kono, A, Abe, K

    Journal of JSCE (A2: Applied Mechanics)   77 ( 2 )   I_239 - I_249   2022.2

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  • Effect of rail lateral realignment on track buckling probability Reviewed

    Abe, K, Arai, Y, Koro, K

    Transactions of JASCOME   21   45 - 50   2021.12

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  • Wheel-track vibration analysis of ballasted track with spatial variation of ballast material parameters Reviewed

    Koro, K, Abe, K

    Journal of Railway Engineering, JSCE   25   225 - 232   2021.7

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  • Possibility of resonation of a bogie-track coupling system at passing-frequency of two sleeper spans Reviewed

    Tanaka, T, Abe, K, Koro, K

    25   33 - 40   2021.7

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  • Stochastic influence of geometrical and mechanical variations in track structure on its buckling safety Reviewed

    Iwai, K, Abe, K, Koro, K

    25   69 - 76   2021.7

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  • PARAMETRIC INSTABILITY OF TWIN WHEELS MOVING ON A PERIODICALLY SUPPORTED RAIL Reviewed

    Abe, K, Nakayama, T, Koro, K

    Journal of JSCE (A2: Applied Mechanics)   76 ( 2 )   I_57 - I_66   2021.2

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  • Influence of stochasticity in lateral rail deflection on probabilistic nature of track buckling temperature Reviewed

    Abe, K, Mizuno, Y, Koro, K

    24   167 - 174   2020.7

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  • Polynomial chaos展開を用いた確率有限要素法によるバラスト材の力学挙動の空間的ばらつきを考慮した道床沈下解析 Reviewed

    紅露一寛, 上平健太, 阿部和久

    計算数理工学論文集   19   55 - 60   2019.12

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  • 三次元電気探査法に基づくトンネル切羽前方地山推定手法の改善 Reviewed

    竹内 新, 阿部和久, 椎谷成孝, 紅露一寛

    計算数理工学論文集   19   43 - 48   2019.12

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  • 地下鉄軌道構造が近接建物内の振動・騒音に及ぼす影響の解析的評価 Reviewed

    山田高也, 山田壮太, 阿部和久, 古田 勝, 末原美智子, 吉武 翔, 紅露一寛

    土木学会鉄道工学シンポジウム論文集   23   275 - 282   2019.7

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  • 軌道状態が通り変位軸力推定法の推定精度に及ぼす影響 Reviewed

    佐藤拓郎, 阿部和久, 清水彰久, 紅露一寛

    土木学会鉄道工学シンポジウム論文集   23   253 - 260   2019.7

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  • 地下鉄トンネル・地盤連成系の三次元加振応答解析 Reviewed

    阿部 和久, 山田 高也, 古田 勝, 末原 美智子, 紅露 一寛

    土木学会論文集A2(応用力学)   74 ( 2 )   I_523 - I_534   2019.1

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  • トンネル発破解析を対象とした3次元個別要素法の計算効率改善 Reviewed

    今野真精, 阿部和久, 若月和人, 紅露一寛

    計算数理工学論文集   18   29 - 34   2018.12

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  • A monitoring method for track mechanical conditions using rail lateral displacement observed by commercial trains Reviewed

    Abe, K, Chiba, S, Sato, T, Komatsu, Y, Koro, K

    Journal of Railway Engineering, JSCE   22   107 - 114   2018.7

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  • Influence of spatial variation of elastoplastic behavior of ballast material on simulated ballast settlement Reviewed

    Koro, K, Iguchi, K, Abe, K

    Journal of Railway Engineering, JSCE   22   247 - 254   2018.7

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  • 等間隔に欠陥が存在する周期場を対象とした効率的分散解析手法 Reviewed

    阿部和久, 筧 拓哉, 紅露一寛

    土木学会論文集A2(応用力学)   73 ( 2 )   I_133 - I_141   2018.1

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    DOI: 10.2208/jscejam.73.I_133

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  • 離散支持されたレールの時間域伝達境界 Reviewed

    阿部和久, 戸田大介, 紅露一寛

    計算数理工学論文集   17   59 - 64   2017.12

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  • Simulation of uncertainty of dynamic responce in wheel-track vibration system with spatial variation of geometric dimension or material parameter of its component members Reviewed

    Koro, K, Watanabe, A, Abe, K

    17   37 - 42   2017.12

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  • 比抵抗トモグラフィによるトンネル切羽前方の三次元地山構造推定 Reviewed

    佐々木丈, 阿部和久, 椎谷成孝, 今村大介, 紅露一寛

    計算数理工学論文集   17   71 - 76   2017.12

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  • 風向を考慮した3次元数値解析によるコンクリート橋の付着塩分量推定 Reviewed

    山下将一, 富山潤, 阿部和久, 佐伯竜彦, 紅露一寛

    コンクリート構造物の補修,補強,アップグレード論文報告集   17   2017.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:日本材料学会  

    J-GLOBAL

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  • 吊り上げ式レール軸力測定法の改善に関する一検討 Reviewed

    遠藤一彰, 阿部和久, 紅露一寛

    土木学会鉄道工学シンポジウム論文集   21   75 - 81   2017.7

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  • A SIMULATION OF CONTROLED BLASTING WITH CONTINUOUS SLOT BY DISCRETE ELEMENT ANALYSIS AND ELUCIDATION OF THE VIBRATION REDUCTION EFFECT Reviewed

    WAKATSUKI Kazuhito, SAITO Yutaka, ABE Kazuhisa, KORO Kazuhiro

    Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering)   72 ( 3 )   I_16 - I_27   2017.2

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    &nbsp;It is known that the controled blasting with continuous slot can largely reduce blasting vibration. However, the mechanism of its effect has not been discussed yet. Therefore, the design of the rational blasting pattern in the controled blasting with continuous slot was difficult to be realized.<br>&nbsp;In this study, the vibration reduction due to the employment of the controlled blasting with continuous slot is discussed from the viewpoints of the fracture behavior, the energy balance in the neighborhood of blasthole and the wave energy radiated to the far field. To this end, numerical experiments are achieved, and the role of free face and the dynamic nature of radiated waves are investigated.

    DOI: 10.2208/jscejte.72.I_16

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  • 欠陥を等間隔に配置した周期層の波動透過解析 Reviewed

    筧 拓哉, 阿部和久, 紅露一寛, Quinay Pher, Errol Balde

    土木学会論文集A2(応用力学)   72 ( 2 )   I_197 - I_206   2017.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2208/jscejam.72.I_197

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  • Influence of spatial variation of elastic modulus of ballast material on vibration response of a ballasted railway track Reviewed

    Watanabe, A, Koro, K

    72 ( 2 )   I_265 - I_276   2017.1

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    DOI: 10.2208/jscejam.72.I_265

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  • Influence of spatial variation of Young's modulus of ballast material on ballast settlement analysis based on cyclic densification elastoplastic model Reviewed

    16   7 - 12   2016.12

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  • 地震動を受ける軌道の動的不安定性に関する理論的検討 Reviewed

    千葉颯兵, 阿部和久, 紅露一寛

    土木学会鉄道工学シンポジウム論文集   20   193 - 200   2016.7

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  • Cyclic densificationモデルを用いた道床沈下解析における材料パラメータの変動の影響評価 Reviewed

    紅露一寛, 林 栞菜, 阿部和久

    土木学会鉄道工学シンポジウム論文集   20   177 - 184   2016.7

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  • ELASTIC WAVE TRANSMISSION THROUGH COMPOSITE LAYERS CONSISTING OF DIFFERENT PERIODICITIES Reviewed

    ABE Kazuhisa, KAKEHI Takuya, KORO Kazuhiro, QUINAY Pher Errol Balde

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   71 ( 2 )   I_859 - I_867   2016.2

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    This paper presents an FE-based elastic wave transmission analysis method for composite layers consisting of different periodicities. In particular, problems in which the ratio of lattice constants of both composite arrays is given by a rational number are considered. Under this condition, by the aid of the Floquet transform, the present problem is reduced to a dynamic response of a unit cell representing each periodic layer. The developed method is applied to wave transmission through composite layers formed by circular inclusions. Numerical results showed that a combination of composites having different stop bands contributes to the vibration attenuation.

    DOI: 10.2208/jscejam.71.I_859

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  • DE-based numerical simulation of blasting experiment of a concrete box Reviewed

    15   19 - 24   2015.12

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  • Influence of damping and rail stress on parametric instability of a wheel Reviewed

    Abe, K, Hosaka, K, Koro, K, Quinay, P.E

    Proceedings of International Symposium on speed-up and Sustainable Technology for Railway and Maglev Systems   2015   "2A11 - 1"-"2A11-11"   2015.11

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    Parametric instability of a wheel moving at a constant speed on a railway track is discussed. For this purpose, this paper presents an analytical formulation in which the damping is considered in rail supports. Since the dynamic behavior of a railway track depends on the rail axial load arising from the temperature change, this effect is also taken into account in the present mathematical model. Through numerical analyses, it is found that the eigenvalue which characterizes the quasi-steady-state dynamic reaction of the moving wheel and track is translated toward the positive imaginary number under the existence of damping. The range of unstable velocity is then narrowed by the introduction of dissipation into the track structure. Moreover, the critical damping at which the instability zone vanishes is obtained. Although the compressional rail stress reduces the instability speed, its contribution to the critical damping is insignificant.

    DOI: 10.1299/jsmestech.2015._2A11-1_

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  • Influence of thermal dependency of pad stiffness on measurement of rail axial load based on a vibration method Reviewed

    Takahashi, H, Abe, K, Urakawa, F, Koro, K

    Proceedings of International Symposium on speed-up and Sustainable Technology for Railway and Maglev Systems   2015   "1B34 - 1"-"1B34-11"   2015.11

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    A measuring method of rail axial load based on vibration modes is discussed. In particular, the influence of the thermal dependency of rubber pads on the natural frequency of the pinned-pinned mode is investigated. To this end, in the numerical track model a rotational spring is attached at each rail support. Through numerical experiments, it is found that the thermal dependency of the rotational stiffness dominates the sensitivity of the resonant frequency to the axial load, and its consideration is essential to simulate the dynamic nature of tracks. Furthermore, the identification of the temporal equivalent rotational stiffness reflecting the rail pad and fastener is attempted. Numerical results show that the identification using the ratio of bending moment to rotation angle of rail measured around the rail support has the best performance. In this case, the measurement with error of 0.1% is required to assure the identification accuracy of ±50kN.

    DOI: 10.1299/jsmestech.2015._1B34-1_

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  • FE-based ballast settlement analysis considering wheel-track dynamic response

    Koro, K, Abe, K

    Proceedings of International Symposium on speed-up and Sustainable Technology for Railway and Maglev Systems   2015   "3C12 - 1"-"3C12-9"   2015.11

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    The FE-based coupling method with ballast settlement elastoplastic analysis and track vibration analysis considering unsupported sleepers is developed to accurately evaluate the sleeper-ballast interaction force in deteriorated track. The present method is used to investigate the evolution of the ballast settlement around a junction of concrete slab and ballast layer. In the analysis considering unsupported sleepers, the maximum of the sleeper-ballast interaction force at the sleeper away from the junction increases in progression of the number of loading cycles at higher rate than that without loose sleepers. A larger maximum force causes a larger permanent deformation of ballast layer. This is because the progression of ballast settlement leads to an increase in the number of unsupported sleepers in neighborhood of a supported sleeper.

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  • AN EXPERIMENT OF CONTROLED BLASTING WITH CONTINUOUS SLOT AND ITS NUMERICAL SIMULATION BY THE DISTINCT ELEMENT METHOD Reviewed

    WAKATSUKI Kazuhito, SAITO Yutaka, ABE Kazuhisa, KORO Kazuhiro

    Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering)   71 ( 3 )   l_1 - l_10   2015.11

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    The Blasting vibration can be reduced substantially by the employment of the controled blasting with continuous slot. Despite of this capability, the behavior concerning the dynamic fracture and vibration during the blasting process have not been clarified, and a numerical analysis method which can estimate these phenomena appropriately has not been developed. We propose a DEM-based analysis method which simulates the dynamic process consisting of both dynamic fracture and vibration. In this study a blasting experiment is also achieved for concrete blocks. The developed numerical method is then applied to its simulation. Through these analyses, the validity of the present method is discussed.

    DOI: 10.2208/jscejte.71.I_1

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  • まくらぎの浮きを考慮した軌道振動・道床沈下連成解析 Reviewed

    相田真人, 紅露一寛, 阿部和久

    土木学会鉄道工学シンポジウム論文集   19   127 - 134   2015.7

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  • 軌道横変位共振による座屈誘発の可能性に関する解析的検討 Reviewed

    阿部和久, 丸山聖司, 紅露一寛

    土木学会鉄道工学シンポジウム論文集   19   21 - 28   2015.7

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  • SENSITIVITY OF CRITICAL VELOCITY TO A MOVING LATERAL LOAD ALONG A RAILWAY TRACK Reviewed

    MARUYAMA Seiji, ABE Kazuhisa, KORO Kazuhiro

    Journal of applied mechanics   70 ( 2 )   I_971 - I_980   2015.2

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    This paper investigates the influence of mechanical nonlinearity at the interface between the sleeper and ballast on the critical velocity of moving lateral load acting on an axially stressed rail. To this end, a mathematical model consisting of an elastic half-space and an infinite beam is considered. Taking into account the nonlinear stiffness in the interaction system, the critical velocity is derived via dispersion corves drown in the wavenumber-frequency space. The sensitivity of the critical velocity to the disturbance represented by a lateral moving load is revealed through theoretical discussion. Furthermore, in order to verify this phenomenon, steady-state solutions governed by the hysteresis property of the ballast material are obtained numerically for a compressed beam subjected to a moving load.

    DOI: 10.2208/jscejam.70.I_971

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  • VIBRATION REDUCTION BY HOLE ARRANGEMENT FOR TUNNEL BLASTING Reviewed

    14   1 - 6   2014.12

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  • Cyclic elastoplastic FEM with time-domain homogenization and extended subloading surface elastoplastic model for ballast settlement analysis Reviewed

    Kazuhiro KORO, Kazuki OHKUBO, Kazuhisa ABE

    Transactions of JASCOME   14   37 - 42   2014.12

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  • Influence of sleeper spacing on the vibration and noise properties of railway track Reviewed

    Sodbilig, B, Abe, K, Koro, K

    Journal of Railway Engineering, JSCE   18   23 - 30   2014.7

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  • FE-based method with cyclic densification elastoplastic model for ballast settlement analysis considering wheel-track dynamic response Reviewed

    Koro, K, Sato, E, Abe, K

    Journal of Railway Engineering, JSCE   18   227 - 234   2014.7

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  • Dynamic instability of a wheel moving on a discretely supported infinite rail Reviewed

    Kazuhisa Abe, Yuusuke Chida, Pher Errol Balde Quinay, Kazuhiro Koro

    JOURNAL OF SOUND AND VIBRATION   333 ( 15 )   3413 - 3427   2014.7

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    The parametric instability of a wheel moving on a discretely supported rail is discussed. To achieve this, an analysis method is developed for a quasi-steady-state problem which can represent an exponential growth of oscillation. The temporal Fourier transform of the rail motion is expanded by a Fourier series with respect to the longitudinal coordinate, and then the response of the rail deflection due to a quasi-harmonic moving load is derived. The wheel/track interaction is formulated by the aid of this function and reduced to an infinite system of linear equations for the Fourier coefficients of the contact force. The critical velocities between the stable and unstable states are calculated based on the nontrivial condition of the homogeneous matrix equation. Through these analyses the influences of the modeling of rail and rail support on the unstable speed range are examined. Moreover, not only the first instability zone but also other zones are evaluated. (C) 2014 Elsevier Ltd. All rights reserved.

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  • Influence of sleeper spacing on vibration and noise of railway tracks

    K. Abe, S. Batjargal, K. Koro

    PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2014) AND INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2014)   3385 - 3396   2014

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    This paper investigates the influence of sleeper spacing on the vibration and noise of railway tracks. Through numerical experiments of stationary harmonic loading problems for different sleeper distributions, the relationship between the variance of deviation in the sleeper location and the mean value and variance of the resonant amplitude is evaluated. The influence of randomness in the sleeper spacing on the frequency response is also examined. Moreover, since the track vibration is excited due to the interaction between the track and a running train, such problems are analyzed, taking into account the roughness between the railhead and the wheel tread. Based on a number of simulations, we assess the effect of the random and optimal sleeper distributions on the vibration and noise reductions.

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  • Application of Haar wavelets to time-domain BEM for the transient scalar wave equation Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    IOP Conference Series: Materials Science and Engineering   10 ( 1 )   2014

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    The time-domain boundary element method using the Haar wavelets is developed for reducing the computational cost of the BE wave propagation analysis. The Haar wavelets are used for the discretization of the boundary integral equation. The time variation of the unknown potential and flux is approximated using the conventional scheme. The small matrix entries of the coefficient matrix are truncated with the Beylkin-type matrix compression scheme at before and after calculation of double boundary integral. The present BEM has the numerical stability comparable to the piecewise constant Galerkin BEM. The sparsity of the coefficient matrix generated at an each time step rises as the time step proceeds
    the memory requirement of the present method can be reduced in comparison with the conventional BEM. The reduction of the computational work from the conventional BE analysis is difficult because of the sparse system of the conventional time-domain BEM.

    DOI: 10.1088/1757-899X/10/1/012222

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  • Cyclic deformation analysis using extended subloading surface elastoplastic model and time-domain homogenization method Reviewed

    Ohkubo, K, Koro, K, Abe, K

    Transaction of JASCOME   13   67 - 72   2013.11

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  • Distinct element analysis of rock fracture and fragmentation due to blasting with free face Reviewed

    Ishizawa, K, Wakatsuki, K, Abe, K, Koro, K

    Transaction of JASCOME   13   61 - 66   2013.11

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  • Number of non-zero matrix entries in wavelet BEM for steady-state out-of-plane wave propagation problems Reviewed

    Kazuhiro KORO, Kazuhisa ABE

    Proc. of JSCE A2 (Applied Mechanics)   69 ( 2 )   I_163 - I_173   2013.8

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    DOI: 10.2208/jscejam.69.I_163

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  • Dispersion analysis of surface elastic waves for ground with finite-length periodic piles Reviewed

    Shun FURUSATO, Kazuhisa ABE, Kazuhiro KORO, Pher Errol Balde QUINAY

    Proc. of JSCE A2 (Applied Mechanics)   69 ( 2 )   I_799 - I_807   2013.8

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  • Influence of machanical nonlinearity in railway track on resonant frequency-rail axial load relationship Reviewed

    Tomohiro AKUTSU, Kazuhisa ABE, Kazuhiro KORO

    Journal of Railway Engineering, JSCE   17   105 - 112   2013.7

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  • Application of finite element method with cyclic densification model to settlement analysis of railway ballasted track Reviewed

    Emi SATO, Kazuhiro KORO, Kazuhisa ABE

    Journal of Railway Engineering, JSCE   17   143 - 150   2013.7

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  • Sleeper spacing optimization for vibration reduction in rails Reviewed

    Batjargal Sodbilig, Kazuhisa Abe, Kazuhiro Koro

    COSEIK J. Comput. Struct. Eng.   25 ( 6 )   569 - 577   2012.12

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  • Dispersion analysis of an axially loaded rail discretely supported on an elastic half-space Reviewed

    Abe, K, Chida, Y, Koro, K

    12   13 - 18   2012.12

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  • A coupling method of wavelet BEM and FEM for 2-D steady state scalar wave equation Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Proceedings of JSCE, A2(Applied Mechanics)   68 ( 2 )   237 - 248   2012.8

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    DOI: 10.2208/jscejam.68.I_237

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  • Elastodynamic analysis of two-dimensional periodic structures having a defect Reviewed

    Kazuhisa Abe, Hiroki Honma, Kazuhiro Koro

    Proceedings of JSCE, A2 (Applied Mechanics)   68 ( 2 )   823 - 831   2012.8

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    DOI: 10.2208/jscejam.68.I_823

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  • Influence of variation of material parameters in cyclic deformation anaylsis of railway ballast modeled with extended subloading surface model Reviewed

    Kazuhiro Koro, Tomoya Mashima, Kazuhisa Abe

    Journal of railway engineering, JSCE   16   21 - 28   2012.7

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  • Dynamic response analysis of continuous welded rails having a railroad switch subjected to a thermal stress Reviewed

    Akutsu, T, Abe, K, Ishikawa, D, Koro, K

    Transactions of JASCOME   11   41 - 46   2011.12

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  • Reduction of computational cost of time-domain BEM with space-time wavelet discretization in 2-D diffusion problems Reviewed

    Koro, K, Sato, T, Abe, K

    Transactions of JASCOME   11   19 - 24   2011.12

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  • Steady-state analysis of a periodic continuous bridge subjected to traveling SH-waves Reviewed

    Tamura, K, Abe, K, Koro, K

    Transactions of JASCOME   11   47 - 52   2011.12

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  • FE-Based Surface Elastic Wave Analysis of a Two-Dimensional Periodic Half-Space Reviewed

    K. ABE, T. ARAKI, K. KORO

    Proc. of JSCE(A2: Applied Mechanics)   67 ( 2 )   I_905 - I_913   2011.8

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    DOI: 10.2208/jscejam.67.I_905

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  • Estimation of the number of non-zero entries of coefficient matrix in time-domain boundary element method with Haar wavelets for 2-D diffusion problems Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Proceeding of JSCE A2 (Applied Mechanics)   67 ( 2 )   I_95 - I_106   2011.8

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    DOI: 10.2208/jscejam.67.I_95

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  • Cyclic deformation analysis of railway ballast using 3-D finite element method with cyclic densification model Reviewed

    Kazuhiro Koro, Keita Yamada

    15   85 - 92   2011.7

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  • Dynamic interaction of an infinite railway track and a half-infinite ground subject to a point load Reviewed

    Takano, Y, Abe, K, Koro, K

    Transactions of JASCOME   10   63 - 68   2010.12

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  • Dynamic analyses of an axially loaded curved rail Reviewed

    Ishikawa, D, Abe, K, Koro, K

    Transactions of JASCOME   10   57 - 62   2010.12

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  • Boundary element method with wavelet-based space- and time discretization and its application to diffusion analysis Reviewed

    Koro, K, Sato, T, Abe, K

    Transaction of the Japan Society for Computational Methods in Engineering   10   81 - 86   2010.12

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  • A BE-based shape optimization method enhanced by topological derivative for sound scattering problems Reviewed

    Kazuhisa Abe, Takasuke Fujiu, Kazuhiro Koro

    ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS   34 ( 12 )   1082 - 1091   2010.12

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    This paper presents a BE-based shape optimization method for acoustic problems in the context of shape design of sound insulating walls. In order to avoid the convergence to a local minimal solution around an initial shape, the topological derivative is introduced. Based on the global distribution of the topological derivative, new shape or topology are attained by nucleating small scattering bodies. Evaluation of the topological derivative is achieved within the framework of the boundary element analysis. To cope with the topological change due to the nucleation and cutting of thin branches, shape is updated by the aid of the level set approach during the optimization process. Through numerical examples, it is proved that the developed method can find a shape with good performance irrespective of its initial shape. (C) 2010 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.enganabound.2010.06.017

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  • Elastic wave propagation in periodic composites with a layer Reviewed

    Kazuhisa Abe, Yutaka Nakayama, Kazuhiro Koro

    Journal of Applied Mechanics JSCE   13   1041 - 1048   2010.8

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  • Time-Domain Boundary Element Method Using Non-orthogonal Spline Wavelets for 2-D Scalar Wave Equation Reviewed

    Kazuhiro Koro, Yuta Suganami, Akira Furukawa, Kazuhisa Abe

    Journal of Applied Mechanics JSCE   13   241 - 252   2010.8

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  • Wave propagation analysis by 3-D beam elements for an infinite track having axially loaded rails Reviewed

    Saki Shimizu, Kazuhisa Abe, Akira Aikawa, Kazuhiro Koro

    Journal of Railway Engineering JSCE   14   75 - 82   2010.7

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  • Development of transmitting boundary for periodically supported rails Reviewed

    Kazuhisa Abe, Shingo Fujishita, Kazuhiro Koro

    Journal of Mechanical Systems for Tansportation and Logistics, JSME   3 ( 1 )   44 - 52   2010.1

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    This paper presents a numerical method to construct transmitting boundaries for periodically supported railway tracks. This is realized by the derivation of impedance matrix for a half-infinite track. To achieve this, dynamic response of the infinite track corresponding to the half-infinite model is analyzed for a series of harmonic loading modes. The infinite problems are solved by virtue of Floquet transform. The developed method is applied to a periodically supported rail having a finite irregular zone subjected to harmonic loads. It is reduced to a dynamic problem of a finite track with the transmitting boundaries attached on both ends. Through comparison with the present method and a conventional way using a very long but finite railway model, the superiority over the truncated model is demonstrated.

    DOI: 10.1299/jmtl.3.44

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  • Computational efficiency of time-domain boundary integral equation method using wavelets for diffusion problems Reviewed

    Koro, K, Igarashi, K, Abe, K

    Transactions of the Japan Society for Computational Methods in Engineering   9   73 - 78   2009.12

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  • Steady-state interaction analysis of a railway track and a running wheel Reviewed

    Sanariya, A, Abe, K, Koro, K

    Transactions of the Japan Society for Computational Methods in Engineering   9   61 - 66   2009.12

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  • Wave propagation in an axially loaded rail Reviewed

    Shimizu, S, Abe, K, Aikawa, A, Koro, K

    Transactions of the Japan Society for Computational Methods in Engineering   9   67 - 72   2009.12

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  • An enhancement of surface wave analysis method for periodic half-planes Reviewed

    Abe Kazuhisa, Kasahara Yuuki, Koro Kazuhiro

    Journal of Applied Mechanics, JSCE   12   1013 - 1020   2009.8

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  • 3-D FE simulation of cyclic loading tests of railway ballasted track using subloading surface elastoplastic model

    Kazuhiro Koro, Yuta Fukutsu, Kazuhisa Abe

    Proc. of STECH2009   2009.6

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  • Steady-state analysis of a railway track subjected to a moving load Reviewed

    Kazuhisa ABE, Takutoshi FURUYA, Kazuhiro KORO

    Transaction of the Japan Society for Computational Methods in Engineering   8   7 - 12   2008.11

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  • Surface wave propagation in half-planes having periodic structures Reviewed

    Kazuhisa ABE, Yuki KASAHARA, Kazuhiro KORO

    Journal of Applied Mechanics, JSCE   11   1031 - 1038   2008.8

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    DOI: 10.2208/journalam.11.1031

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  • Formulation of time-domain homogenization method for cyclic deformation analysis of railway ballast Reviewed

    Kazuhiro KORO, Toyo KAKAZU, Kazuhisa ABE

    Journal of Applied Mechanics, JSCE   11   149 - 158   2008.8

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  • Wave propagation in an infinitely continuous viaduct Reviewed

    Kazuhisa ABE, Atsushi SANARIYA, Kazuhiro KORO

    Proceedings of Railway Mechanics JSCE   12   25 - 30   2008.7

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  • Topology optimization analysis of incompressible hyperelastic materials by VOF method Reviewed

    Kazuhisa ABE, Tomoya KOITABASHI, Kazuhiro KORO

    Transaction of the Japan Society for Computational Methods in Engineering   7 ( 2 )   243 - 248   2008.3

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  • VOF-based finite element analysis for deposition and deformation of snow Reviewed

    Toru OGAWA, Kazuhisa ABE, Kazuhiro KORO

    Journal of Structural Engineering   54A   114 - 123   2008.3

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    DOI: 10.11532/structcivil.54A.114

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  • Wave propagation in an infinite rail discretely supported by sleepers Reviewed

    Kazuhisa ABE, Takutoshi FURUYA, Kazuhiro KORO

    Journal of Applied Mechanics, JSCE   10   1029 - 1036   2007.8

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    DOI: 10.2208/journalam.10.1029

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  • Design sensitivity analysis of subway tunnel considering vibration reduction. "jointly worked" Reviewed

    Kazuhisa Abe, Yuki Kasahara, Kazuhiro Koro, Masaru Furuta

    Proceedings of Railway Mechanics JSCE   11   57 - 62   2007.7

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  • Cyclic deformation analysis of railway ballast using subloading surface elastoplastic model Reviewed

    Kazuhiro Koro, Munemitsu Kajiwara, Kazuhisa Abe

    Proceedings of Railway Mechanics JSCE   11   7 - 13   2007.7

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  • Usefulness of constitutive models for railway ballast sunjecting to cyclic loading Reviewed

    Kazuhiro Koro, Toyo Kakazu, Munemitsu Kajiwara, Kazuhisa Abe

    Transaction of the Japan Society for Computational Methods in Engineering   7 ( 1 )   31 - 36   2007.6

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  • Vibration analysis of a loaded infinite rail with discrete supports Reviewed

    Kazuhisa Abe, Takutoshi Furuya, Kazuhiro Koro

    Transaction of the Japan Society for Computational Methods in Engineering   7 ( 1 )   25 - 30   2007.6

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  • A boundary element approach for topology optimization problem using the level set method Reviewed

    Kazuhisa Abe, Shunsuke Kazama, Kazuhiro Koro

    COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING   23 ( 5 )   405 - 416   2007.5

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    A boundary element method is developed for the topology optimization problem. The topological change is captured using the level set method. The level set function which is defined by signed distance from the boundary contour is assigned to fixed grid points. Boundary elements are developed along the zero contour of the level set function. The design sensitivity analysis is performed for the boundary element equation, and then the boundary velocity is obtained. The velocity field which leads the level set function to optimal material distribution is obtained by the extension of the boundary velocity. Numerical examples show that the proposed method is valid for the topology optimization problems. Copyright (c) 2006 John Wiley & Sons, Ltd.

    DOI: 10.1002/cnm.919

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  • Topology optimization analysis by VOF method using triangular and tetrahedral elements Reviewed

    Yuki Nishinomiya, Kazuhisa Abe, Kazuhiro Koro

    Journal of Applied Mechanics JSCE   9   353 - 363   2006.8

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    DOI: 10.2208/journalam.9.353

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  • A topology optimization approach using VOF method Reviewed

    K. Abe, K. Koro

    STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION   31 ( 6 )   470 - 479   2006.6

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    Topology optimization methods with continuous design variables obtained by the homogenization formula or the solid isotropic microstructure with penalty (SIMP) model are widely used in the layout of structures. In the implementation of these approaches, one must take into account several issues, e.g., irregularity of the problem, occurrence of the checkerboard pattern, and intermediate density. To suppress these phenomena, the employment of additional strategies such as the perimeter control or the filtering method will be required. In this paper, a topology optimization method which can eliminate these difficulties is developed based on the volume of fluid (VOF) method. In the method, shape design is described in terms of the VOF function. Since this function is defined by a volume fraction of material occupying each element, it can be recognized as a continuous material density in the SIMP model. Within the framework of the VOF analysis, the topology optimization procedure is reduced to a convection motion of the material density governed by a Hamilton-Jacobi equation as in the level set method. Through numerical examples, the validity of the proposed method is investigated.

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  • Modeling of deformation hardening of snow and its application to snow deformation analysis by FEM Reviewed

    Kazuhisa Abe, Kazuhiro Koro

    Journal of Structural Engineering   52A ( 1 )   109 - 117   2006.3

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  • Finite element simulation of the field test on the railway track with rail joints Reviewed

    Kazuhiro Koro, Kazuhisa Abe, Makoto Ishida, Takahiro Suzuki

    Journal of Applied Mechanics JSCE   8   1037 - 1047   2005.8

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    DOI: 10.2208/journalam.8.1037

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  • Finite deformation stress analysis for rubber vibroisolation pads used in railway track Reviewed

    Kazuhiro Koro, Kazuhisa Abe, Yuki Nishinomiya

    Proceedings of Railway Mechanics JSCE   9   7 - 12   2005.7

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  • A finite element snow deformation analysis using VOF method Reviewed

    Kazuhisa Abe, Kazuhiro Koro

    Journal of Structural Engineering   51A ( 1 )   277 - 284   2005.3

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  • Measurement on dynamic behaviour of track near rail joints and prediction of track settlement Reviewed

    Takahiro Suzuki, Makoto Ishida, Kazuhisa Abe, Kazuhiro Koro

    Quarterly Report of RTRI (Railway Technical Research Institute) (Japan)   46 ( 2 )   124 - 129   2005

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    We measured factors relating to track dynamic behaviour, such as dynamic wheel loads and rail seat forces near a rail joint induced by running vehicles. We also proposed a track dynamic model to consider the excitation by wheels passing over discontinuous fish plate rail joints. We then compared the measured and analytical results, and found a close agreement between them. We also proposed a prediction model of ballast settlement near rail joints and calculated the effects of countermeasures against joint dips on ballast settlement.

    DOI: 10.2219/rtriqr.46.124

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  • Matrix-compression property of Beylkin-type truncation scheme for wavelet BEM Invited

    Kazuhiro Koro, Kazuhisa Abe

    Structural Engineering/Earthquake Engineering   22 ( 2 )   219s - 231s   2005

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    In the present paper, we investigate theoretically and experimentally the number of non-zero matrix entries generated by the wavelet BEM with the Beylkin-type compression algorithm. The Beylkin-type algorithm, which is based on a prescribed level-independent threshold, retains the asymptotic convergence rate of BE solutions, like widely-used level-dependent compression schemes. The coefficient matrix compressed by the Beylkin-type scheme has O(N 1+γ) (0 &lt
    γ &lt
    1, N: degree of freedom (DOF)) non-zero entries
    level-dependent schemes enable us to reduce the matrix entries up to O(N(log N)α) (α ≥ 1). However, for matrix compression using the Beylkin-type scheme the compression rate is greater than or comparable to that of the Schneider's level-dependent scheme, in the moderate DOF range.

    DOI: 10.2208/jsceseee.22.219s

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  • Influence of ballast- and substrate models on simulated impact response in rail joints of railway track Reviewed

    Kazuhiro Koro, Kazuhisa Abe, Makoto Ishida, Takahiro Suzuki

    Journal of Applied Mechanics JSCE   7   1313 - 1323   2004.8

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    DOI: 10.2208/journalam.7.1313

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  • Study on wheel load variation excited at rail joints. "jointly worked" Reviewed

    Takahiro Suzuki, Makoto Ishida, Kazuhisa Abe, Kazuhiro Koro

    Proceedings of Railway Mechanics JSCE   8   35 - 40   2004.7

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  • Timoshenko beam finite element for vehicle-track vibration analysis and its application to jointed railway track Reviewed

    K Koro, K Abe, M Ishida, T Suzuki

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT   218 ( 2 )   159 - 172   2004.6

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    A Timoshenko beam finite element suitable for vehicle-track vibration analysis is proposed and is applied to a jointed railway track. In several simulation models, the track vibration excited by a train running on the rail is formulated as a dynamic problem where a sequence of concentrated loads moves on the discretely supported Timoshenko beam. The external force is then defined by the concentrated load. The Timoshenko beam subjected to concentrated loads deforms with the slope discontinuity at the loading points. This deformation cannot be represented by the usual finite elements, which causes the fictitious responses of the beam. The present finite element model removes the undesirable response by completely modelling the slope discontinuity. This is achieved by the TIM7 element with the piecewise-linear hat functions. The jointed track model constructed by this finite element is employed to predict the impulsive wheel-track contact force excited by the wheel passage on rail joints. The rail joints with fishplates are of great concern to track deterioration, the settlement of ballast track and the failure of track components. In the present paper the effects of train speed and gap size of the joints on the impact force are assessed from simulation results.

    DOI: 10.1243/0954409041319687

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  • Integral equation method using static fundamental solution for Timoshenko beams subjected to moving dynamic loads. "jointly worked" Reviewed

    Kazuhisa Abe, Kazuhiro Koro

    Journal of Structural Engineering   50A ( 1 )   143 - 150   2004.3

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  • hr-wavelet BEM with arbitrary degrees of freedom. "jointly worked" Reviewed

    Kazuhisa Abe, Daisuke Okada, Kazuhiro Koro

    Proceedings of the 20th Japan National Symposium on Boundary Element Methods   20   15 - 20   2003.12

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  • Matrix-compression property of Beylkin-type truncation scheme for wavelet BEM. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Journal of Applied Mechanics JSCE   6   301 - 310   2003.8

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    DOI: 10.2208/journalam.6.301

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  • A practical determination strategy of optimal threshold parameter for matrix compression in wavelet BEM Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    International Journal for Numerical Methods in Engineering   57 ( 2 )   169 - 191   2003.5

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    A practical strategy is developed to determine the optimal threshold parameter for wavelet-based boundary element (BE) analysis. The optimal parameter is determined so that the amount of storage (and computational work) is minimized without reducing the accuracy of the BE solution. In the present study, the Beylkin-type truncation scheme is used in the matrix assembly. To avoid unnecessary integration concerning the truncated entries of a coefficient matrix, a priori estimation of the matrix entries is introduced and thus the truncated entries are determined twice: before and after matrix assembly. The optimal threshold parameter is set based on the equilibrium of the truncation and discretization errors. These errors are estimated in the residual sense. For Laplace problems the discretization error is, in particular, indicated with the potential's contribution ∥c∥ to the residual norm ∥R∥ used in error estimation for mesh adaptation. Since the normalized residual norm ∥c∥/∥u∥ (u: the potential components of BE solution) cannot be computed without main BE analysis, the discretization error is estimated by the approximate expression constructed through subsidiary BE calculation with smaller degree of freedom (DOF). The matrix compression using the proposed optimal threshold parameter enables us to generate a sparse matrix with O(N1+γ) (O≤γ &lt
    1) non-zero entries. Although the quasi-optimal memory requirements and complexity are not attained, the compression rate of a few per cent can be achieved for N ∼ 1000. © 2003 John Wiley and Sons, Ltd.

    DOI: 10.1002/nme.666

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  • A wavelet method for reducing the computational cost of BE-based homogenization analysis Reviewed

    K Koro, K Abe

    ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS   27 ( 5 )   439 - 454   2003.5

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    A wavelet BEM is applied to the evaluation of the effective elastic moduli of unidirectional composites, based on the homogenization theory. This attempt is devoted to the reduction of computational cost for the BE-based homogenization analysis. Truncation for matrix compression is carried out by the Beylkin-type algorithm. A thresholding value for the truncation is set such that the discretization error of BE solution is comparable to its truncation error. Besides, rearrangement of the BE equations is proposed to attain rapid convergence of iterative solutions. Through investigation of asymptotical convergence of the effective moduli, it is found that the BE-based homogenization analysis ensures the same rate of convergence for effective moduli as for characteristic functions. By applying the wavelet BEM to heterogeneous media which have microstructures with many voids, the effective moduli with agreement of 2-4 digits can be evaluated using 20-50% memory requirements of conventional BE approaches. (C) 2003 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0955-7997(02)00154-6

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  • Implementation of multigrid algorithms in wavelet BEM for mixed boundary value problems. "jointly worked" Reviewed

    Kazuhisa Abe, Shiho Hayashi, Kazuhiro Koro

    Proceedings of the 19th Japan National Symposium on Boundary Element Methods   19   7 - 12   2002.12

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  • Numerical treatment of singular and nearly singular integrals in wavelet BEM. "jointly worked" Reviewed

    Kazuhisa Abe, Daisuke Kato, Kazuhiro Koro

    Journal of Applied Mechanics JSCE   5   101 - 109   2002.8

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    DOI: 10.2208/journalam.5.101

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  • hr-adaptive meshing for wavelet BEM. "jointly worked" Reviewed

    Kazuhisa Abe, Jun Nakamura, Kazuhiro Koro

    Transaction of the Japan Society for Computational Methods in Engineering   2   15 - 20   2002.7

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  • Development of effective numerical methods for application of wavelet BEM to engineering problems

    Kazuhiro Koro

    2002.3

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  • Wavelet-weighted Gauss quadrature formula for reduction of computational work in wavelet BEM. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe, Hideyuki Hirabayashi

    Journal of Applied Mechanics JSCE   4   127 - 136   2001.8

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    DOI: 10.2208/journalam.4.127

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  • Application of multigrid preconditioned GMRES method to wavelet BEM. "jointly worked" Reviewed

    Shiho Hayashi, Kazuhisa Abe, Kazuhiro Koro

    Transaction of the Japan Society for Computational Methods in Engineering   1   13 - 18   2001.7

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  • An h-hierarchical Galerkin BEM using Haar wavelets Reviewed

    K Abe, K Koro, K Itami

    ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS   25 ( 7 )   581 - 591   2001.7

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    Application of Haar wavelet to h-hierarchical adaptive method is attempted to improve the performance. The wavelet boundary element method (BEM) is developed by means of the Galerkin method. In order to save memory requirement and computation time, sparse matrices are obtained by truncation of matrix coefficients. Error indicator and estimator are constructed based on the difference between the true solution and its projection onto the mesh. These values are effectively evaluated using the boundary element solution. The adaptive method is developed for 2D Laplace problems. Through numerical examples, performance of the present method is investigated concerning the sparseness of matrices and the computation time devoted to calculation of matrix coefficients and to equation solving process. (C) 2001 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0955-7997(01)00015-7

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  • Non-orthogonal spline wavelets for boundary element analysis Reviewed

    K Koro, K Abe

    ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS   25 ( 3 )   149 - 164   2001.3

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    Non-orthogonal spline wavelets are developed for Galerkin boundary element method. The proposed wavelets have compact supports and closed-form expressions. Besides, one can choose arbitrarily the order of vanishing moments of the wavelets independently of order of B-splines. Sparse coefficient matrices are obtained by truncating the small elements a priori. The memory requirement and computational time can be controled by changing the order of vanishing moments of the wavelets. As an iterative technique for solving the boundary element equations, GMRES(ln) method is employed. Diagonal scaling and incomplete LU factorization (ILU(0)) are considered for the preconditioning. The ILU(0) becomes an effective preconditioner for higher order vanishing moments. Through numerical examples, availability of the proposed wavelets is investigated. (C) 2001 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0955-7997(01)00036-4

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  • Multigrid methods for wavelet BEM. "jointly worked" Reviewed

    Kazuhisa Abe, Shiho Hayashi, Kazuhiro Koro

    Journal of Applied Mechanics JSCE   3   157 - 166   2000.8

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    DOI: 10.2208/journalam.3.157

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  • BE analysis with piecewise constant non-orthogonal wavelets. "jointly worked" Reviewed

    Kazuhisa Abe, Kazuhiro Koro

    Proceedings of the 16th Japan National Symposium on Boundary Element Methods   16   51 - 56   1999.12

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  • Iterative solvers for boundary element equations with wavelets. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Proceedings of the 16th Japan National Symposium on Boundary Element Methods   16   57 - 62   1999.12

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  • Application of discrete wavelet transfirm to wavelet collocation BEM. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe, Hiroaki Tazaki

    Journal of Applied Mechanics JSCE   2   153 - 169   1999.8

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    DOI: 10.2208/journalam.2.153

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  • Computational Efficiency of h-hierarchical adaptive BEM with wavelet functions. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Proceedings of the 15th Japan National Symposium on Boundary Element Methods   15   71 - 76   1998.12

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  • h-Hierarchical adaptive boundary element method with Haar wavelet functions. "jointly worked" Reviewed

    Kazuhiro Koro, Kazuhisa Abe

    Proceedings of the 8th Technology Conference(BTEC-98)   8   49 - 54   1998.7

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Books

  • Imasara kikenai keisanrikigaku-no joseki

    Computational Mechanics subcommittee, Applied Mechanics committee, JSCE( Role: Joint author)

    2020.3  ( ISBN:9784621304983

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    Total pages:xiii, 342p   Language:Japanese

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  • いまさら聞けない 計算力学の常識

    社)土木学会応用力学委員会計算力学小委員会編( Role: Edit)

    丸善  2008.11  ( ISBN:9784621080221

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Presentations

  • FE-based homogenization analysis of a diffusion problems with spatial variations with inclusion shape and matrix diffusion coefficients

    Koro, K

    2022.6 

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  • Wheel-track vibration analysis of a railway track with rails with several spatial variation of material- and shape parameters

    Koro, K, Abe, K

    2022.6 

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  • Ballast settlement analysis considering dynamic behavior of curved track

    Shoya Inoue, Kazuhiro Koro

    2022.3 

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  • Influence of spatial variation of several material parameters of railway ballast on simulated ballast settlement

    Koro, K, Abe, K

    J-RAIL2021  2021.12 

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    Event date: 2021.12

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  • Wheel-track vibration analysis on railjoints with grid-type sleepers

    Koro, K, Kono, K, Abe, K

    J-RAIL2021  2021.12 

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  • FE-based settlement analysis of railway ballast with spatial variation of several material parameters

    Koro, K, Abe, K

    2021.9 

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    Event date: 2021.9

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  • 軌道曲線部におけるバラスト道床繰り返し変形解析のための動的作用力の評価解析

    井上翔陽, 紅露一寛

    第76回土木学会年次学術講演会  2021.9 

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  • Stochastic FE-BE method for homogenization analysis of diffusion problems considering uncertainties of inclusion shape and material parameters

    Koro, K, Shimizu, T, Abe, K

    2021.5 

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  • Fe-based simulation method on wheel-track vibration of jointed railway track with grid-type sleepers

    Koro, K, Kono, A, Abe, K

    2021.5 

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  • Eigenmode analysis of a grid-type sleeper

    Koro, K, Tani, Y

    2023.9 

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  • Influence of modeling of spatial variation of surface profile on simulated dynamic response of railway track

    Koro, K

    2023.5 

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  • Vibration analysis of ballasted track with a railjoint considering contact with a grid-shape sleeper and ballast

    Koro, K, Abe, K

    2022.12 

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  • Ballast cyclic deformation analysis in consideration of curved track vibration

    Koro, K, Inoue, S

    2022.9 

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  • レール継目部衝撃応答の低減に対する井桁状まくらぎ敷設効果の解析的検討

    紅露一寛, 河野昭子, 阿部和久

    第27回鉄道技術・政策連合シンポジウム(J-RAIL2020)  2020.12 

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  • レール継目構造が軌道振動応答に及ぼす影響評価のための軌道振動解析法

    紅露一寛, 河野昭子, 阿部和久

    土木学会第23回応用力学シンポジウム  2020.5 

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  • バラスト材の力学挙動の空間的ばらつきを非Gauss型確率過程によりモデル化したバラスト道床沈下解析

    紅露一寛, 阿部和久

    第26回鉄道技術連合シンポジウム(J-RAIL2019)  2019.12 

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  • 井桁状まくらぎ敷設有道床軌道の振動解析

    福島亮平, 紅露一寛, 河野昭子, 阿部和久

    第26回鉄道技術連合シンポジウム(J-RAIL2019)  2019.12 

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  • バラスト材の弾塑性挙動の空間的ばらつきを考慮したバラスト道床沈下・確率有限要素解析

    上平健太, 紅露一寛, 阿部和久

    第26回鉄道技術連合シンポジウム(J-RAIL2019)  2019.12 

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  • レール継目部を対象とした軌道振動・バラスト道床沈下連成解析法

    紅露一寛, 阿部和久

    第1回交通地盤工学に関する国内シンポジウム  2019.9 

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  • 介在物形状の空間的ばらつきを考慮した均質化拡散係数を用いたスペクトル確率有限要素法解析

    紅露一寛, 阿部和久, 浅井洸太朗

    土木学会第74回年次学術講演会  2019.9 

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  • バラスト材の弾性係数の空間的ばらつきを考慮した軌道振動解析

    紅露一寛, 阿部和久

    第1回交通地盤工学に関する国内シンポジウム  2019.9 

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  • バラスト材の弾塑性挙動の空間的ばらつきを考慮したスペクトル確率有限要素・繰り返し変形解析

    上平健太, 紅露一寛, 阿部和久

    第32回日本機械学会計算力学講演会  2019.9 

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  • バラスト道床の繰り返し弾塑性挙動の空間的ばらつきを考慮した道床沈下解析

    紅露一寛, 上平健太, 阿部和久

    第25回鉄道技術連合シンポジウム(J-RAIL2018)  2018.12 

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  • NISP-SSFEMによるバラスト道床沈下解析における弾塑性挙動の空間的ばらつきの影響評価

    上平健太, 紅露一寛, 阿部和久

    第36回土木学会関東支部新潟会研究調査発表会  2018.11 

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  • A FE-based 2-D ballast settlement analysis of railway track with a rail joint International conference

    Kazuhiro Koro, Kazuhisa Abe

    Fourth International Conference on Railway Technology: Research, Development and Maintenance  2018.9 

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    Venue:Meliá Sitges Hotel Congress Centre, Sitges, Barcelona, Spain  

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  • レール継目通過時の衝撃応答を考慮したバラスト道床沈下解析

    紅露一寛, 福島亮平

    土木学会第73回年次学術講演会  2018.8 

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  • NISP法を援用したスペクトル確率有限要素法によるバラスト道床沈下量予測値に対する弾塑性挙動の空間的ばらつきの影響評価

    上平健太, 紅露一寛, 阿部和久

    土木学会第73回年次学術講演会  2018.8 

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    Venue:北海道大学札幌キャンパス(北海道札幌市)  

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  • 均質化拡散係数における介在物形状の空間的ばらつきの影響評価のためのスペクトル確率境界要素法

    紅露一寛, 阿部和久

    土木学会第21回応用力学シンポジウム  2018.5 

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    Venue:名城大学天白キャンパス(愛知県名古屋市)  

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  • レール曲げ剛性の空間的ばらつきが存在する軌道における車輪走行時の振動応答の定量評価

    渡邉あゆみ, 紅露一寛, 阿部和久

    第24回鉄道技術・政策連合シンポジウム(J-RAIL2017)  2017.12 

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  • バラスト材の弾塑性挙動の空間的ばらつきの影響を考慮したバラスト道床沈下シミュレーション

    井口建斗, 紅露一寛

    第24回鉄道技術・政策連合シンポジウム(J-RAIL2017)  2017.12 

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  • レール継目を有するバラスト軌道を対象とした軌道振動・道床沈下連成解析

    紅露一寛, 阿部和久

    第24回鉄道技術・政策連合シンポジウム(J-RAIL2017)  2017.12 

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  • バラスト材の弾性挙動の空間的ばらつきを有する有道床軌道の動的応答とその変動に対する車輪走行速度の影響

    渡邉あゆみ, 紅露一寛, 阿部和久

    第35回土木学会関東支部新潟会研究調査発表会  2017.11 

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  • バラスト道床沈下解析におけるバラスト材の弾性挙動の空間的ばらつきの影響評価解析法

    井口建斗, 紅露一寛

    第35回土木学会関東支部新潟会研究調査発表会  2017.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • レールの曲げ剛性の空間的ばらつきを考慮した車輪・軌道系の連成振動解析法

    紅露一寛, 渡邉あゆみ, 阿部和久

    第30回計算力学講演会  2017.9  日本機械学会

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    Venue:近畿大学東大阪キャンパス(大阪府東大阪市)  

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  • Cyclic densificationモデルを用いたバラスト道床沈下解析における構成材の弾性挙動の空間変動の影響評価解析法

    井口建斗, 紅露一寛

    土木学会第72回年次学術講演会  2017.9 

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    Venue:九州大学伊都キャンパス(福岡県福岡市)  

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  • バラスト材の弾性挙動の空間的ばらつきを有する有道床軌道における動的応答の変動量に及ぼす走行速度の影響

    渡邉あゆみ, 紅露一寛, 阿部和久

    土木学会第72回年次学術講演会  2017.9 

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  • A FE-based coupling analysis of wheel-track vibration and ballast settlement for railway track with a railjoint

    Koro, K, Sota, M, Aikawa, A, Abe, K

    2017.8 

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  • レール継目部におけるバラスト道床沈下・有限要素解析

    紅露一寛, 相田真人, 阿部和久

    第22回計算工学講演会  2017.5  日本計算工学会

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    Venue:ソニックシティ―(埼玉県さいたま市)  

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  • Cyclic densificationモデルを用いた道床沈下有限要素解析結果におけるバラスト道床の弾性係数の空間変動の影響

    井口建斗, 紅露一寛, 阿部和久

    J-RAIL2016  2016.12 

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    Venue:国立オリンピック記念青少年総合センター(東京都渋谷区)  

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  • バラスト道床の弾性係数の空間変動を考慮した確率有限要素・軌道振動解析法

    渡邉あゆみ, 紅露一寛, 阿部和久

    J-RAIL2016  2016.12 

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    Venue:国立オリンピック記念青少年総合センター(東京都渋谷区)  

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  • バラスト材の弾性係数の空間変動がバラスト軌道各部の動的応答に及ぼす影響

    渡邉あゆみ, 紅露一寛, 阿部和久

    第34回土木学会関東支部新潟会研究調査発表会  2016.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • バラスト材の弾性係数の空間変動を考慮したバラスト道床沈下有限要素解析

    井口建斗, 紅露一寛, 阿部和久

    第34回土木学会関東支部新潟会研究調査発表会  2016.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • 各種離散化条件・車輪走行条件が軌道剛性急変部の道床沈下解析結果に及ぼす影響

    相田真人, 紅露一寛, 阿部和久, 相川明

    第34回土木学会関東支部新潟会研究調査発表会  2016.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • Cyclic densificationモデルにおける Young率の空間変動の影響を考慮したスペクトル確率有限要素法解析

    井口建斗, 紅露一寛, 阿部和久

    第29回計算力学講演会  2016.9  日本機械学会

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    Venue:名古屋大学東山キャンパス(愛知県名古屋市)  

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  • 単調載荷時のバラスト道床の弾塑性有限要素解析結果におけるバラスト材のYoung率の空間変動の影響

    井口建斗, 紅露一寛, 阿部和久

    土木学会第71回年次学術講演会  2016.9  土木学会

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    Venue:東北大学川内北キャンパス(宮城県仙台市)  

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  • 弾性挙動の空間変動を有するバラスト道床を対象としたスペクトル確率有限要素法軌道振動解析

    渡邉あゆみ, 紅露一寛, 阿部和久

    土木学会第71回年次学術講演会  2016.9  土木学会

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    Venue:東北大学川内北キャンパス(宮城県仙台市)  

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  • 軌道剛性急変箇所の道床沈下解析結果に対する各種離散化条件の影響

    相田真人, 紅露一寛, 相川明, 阿部和久

    土木学会第71回年次学術講演会  2016.9  土木学会

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    Venue:東北大学川内北キャンパス(宮城県仙台市)  

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  • SSFEM-based vibration analysis for railway track with spatial variation of elastic modulus of ballast layer International conference

    Kazuhiro Koro, Ayumi Watanabe, Kazuhisa Abe

    WCCM XII & APCOM VI  2016.7 

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    Venue:COEX, Seoul, Korea  

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  • コンクリート道床・バラスト道床接続部におけるバラスト道床沈下解析

    相田真人, 紅露一寛, 阿部和久

    第19回応用力学シンポジウム  2016.5  土木学会

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    Venue:北海道大学札幌キャンパス(北海道札幌市)  

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  • バラスト軌道の振動応答に及ぼすバラスト材の弾性係数の空間変動の影響

    渡邉あゆみ, 紅露一寛

    第19回応用力学シンポジウム  2016.5  土木学会

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    Venue:北海道大学札幌キャンパス(北海道札幌市)  

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  • まくらぎの浮き上がりを考慮した軌道振動・道床沈下連成解析

    相田真人, 紅露一寛, 阿部和久

    第22回鉄道技術連合シンポジウム(J-RAIL2015)  2015.12  日本機械学会

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    Venue:東京大学生産技術研究所(東京都目黒区)  

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  • まくらぎの浮き上がりの考慮がバラスト道床沈下解析結果に及ぼす影響

    相田真人, 紅露一寛, 阿部和久

    第33回土木学会関東支部新潟会研究調査発表会  2015.11 

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    Venue:朱鷺メッセ(新潟県新潟市)  

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  • まくらぎの浮きを考慮したバラスト道床沈下有限要素解析

    相田真人, 紅露一寛, 阿部和久

    第70回土木学会年次学術講演会  2015.9  土木学会

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    Venue:岡山大学津島キャンパス(岡山県岡山市)  

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  • バラスト材の力学挙動の空間変動を考慮した車輪・軌道系の連成振動解析

    紅露一寛, 金山由布子, 阿部和久

    第20回計算工学講演会  2015.6 

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    Venue:つくば国際会議場(茨城県つくば市)  

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  • Spectral stochastic FE analysis for estimating variation of sleeper-ballast interaction force in railway track with spatial variation of elastic moduli of ballast material

    2015.5 

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  • 浮きまくらぎを考慮したバラスト道床沈下有限要素解析

    相田真人, 紅露一寛, 阿部和久

    第42回土木学会関東支部技術研究発表会  2015.3 

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    Venue:東海大学湘南キャンパス(神奈川県平塚市)  

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  • Wavelet基底の利用による定常動弾性境界要素解析の効率化

    紅露一寛, 阿部和久

    第42回土木学会関東支部技術研究発表会  2015.3 

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    Venue:東海大学湘南キャンパス(神奈川県平塚市)  

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  • 車輪・軌道系の振動問題とバラスト道床沈下問題との有限要素連成解析法

    紅露一寛, 佐藤江美, 阿部和久

    第21回鉄道技術・政策連合シンポジウム(J-RAIL2014)  2014.12 

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    Venue:朱鷺メッセ(新潟県新潟市)  

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  • 拡張下負荷面モデルを用いた繰り返し弾塑性問題のための時間域均質化・有限要素解析

    大窪和輝, 紅露一寛, 阿部和久

    第32回土木学会関東支部新潟会研究調査発表会  2014.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • 時間域均質化法を援用した拡張下負荷面モデルに基づく繰り返し弾塑性有限要素解析

    大窪和輝, 紅露一寛, 阿部和久

    第63回理論応用力学講演会  2014.9  日本学術会議

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    Venue:東京工業大学大岡山キャンパス(東京都目黒区)  

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  • 拡張下負荷面モデルを用いた繰り返し弾塑性有限要素解析のための時間域均質化法

    大窪和輝, 紅露一寛, 阿部和久

    第69回土木学会年次学術講演会  2014.9  土木学会

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    Venue:大阪大学豊中キャンパス(大阪府豊中市)  

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  • 拡張下負荷面モデルを用いた繰り返し弾塑性有限要素解析における時間域均質化法の適用

    紅露 一寛, 大窪 和輝, 阿部 和久

    第19回計算工学講演会  2014.6 

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    Venue:広島国際会議場(広島県広島市)  

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  • 拡張下負荷面モデルによるバラスト材の繰り返し変形解析への時間域均質化法の適用

    大窪和輝, 紅露一寛, 阿部和久

    第20回鉄道技術連合シンポジウム(J-RAIL2013)  2013.12 

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    Venue:国立オリンピック記念青少年総合センター(東京都渋谷区)  

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  • 拡張下負荷面モデルによる繰り返し変形解析の効率化のための時間域均質化法

    大窪和輝, 紅露一寛, 阿部和久

    第31回土木学会関東支部新潟会研究調査発表会  2013.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • バラスト道床の繰り返し沈下解析における平面ひずみ近似の適用可能性

    佐藤江美, 紅露一寛, 阿部和久

    第31回土木学会関東支部新潟会研究調査発表会  2013.11 

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    Venue:ハイブ長岡(新潟県長岡市)  

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  • バラスト道床の繰り返し変形挙動の評価における平面ひずみ近似の妥当性の検討

    佐藤江美, 紅露一寛, 阿部和久

    第68回土木学会年次学術講演会  2013.9 

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    Venue:日本大学津田沼キャンパス(千葉県習志野市)  

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  • 拡張下負荷面モデルを用いた繰り返し変形解析における時間域均質化法の援用

    大窪和輝, 紅露一寛, 阿部和久

    第68回土木学会年次学術講演会  2013.9 

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    Venue:日本大学津田沼キャンパス(千葉県習志野市)  

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  • 境界要素法に基づく2次元波動伝播解析の効率化のための wavelet基底の利用

    紅露一寛, 阿部和久

    第62回理論応用力学講演会  2013.3 

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    Venue:東京工業大学大岡山キャンパス(東京都目黒区)  

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  • 拡張下負荷面モデルに基づくバラスト道床繰り返し変形解析における材料パラメータの同定および感度評価

    紅露一寛, 間島朋也, 阿部和久

    第62回理論応用力学講演会  2013.3 

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    Venue:東京工業大学大岡山キャンパス(東京都目黒区)  

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  • Cyclic densificationモデルによるバラスト道床の繰り返し鉛直載荷試験の3次元有限要素解析

    佐藤江美, 紅露一寛, 阿部和久

    第19回鉄道技術連合シンポジウム(J-RAIL2012)  2012.12 

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    Venue:東京大学生産技術研究所(東京都目黒区)  

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  • 弾塑性材料定数の変動を考慮した拡張下負荷面モデルを用いた3次元バラスト道床沈下解析

    間島朋也, 紅露一寛, 阿部和久

    土木学会第67回年次学術講演会  2012.9  土木学会

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    Venue:名古屋大学(愛知県名古屋市)  

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  • Cyclic densificationモデルを用いた有限要素法による有道床バラスト軌道の3次元繰り返し沈下解析

    佐藤江美, 紅露一寛, 阿部和久

    土木学会第67回年次学術講演会  2012.9  土木学会

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    Venue:名古屋大学(愛知県名古屋市)  

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  • 下負荷面モデルを用いたバラスト道床繰り返し変形解析における材料パラメータの感度評価

    紅露一寛, 間島朋也, 阿部和久

    第18回鉄道技術・政策連合シンポジウム(J-RAIL2011)  2011.12 

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    Venue:東京都渋谷区  

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  • Particle Swarm Optimization(PSO)によるバラスト道床繰り返し変形解析の材料パラメータ同定

    紅露一寛, 米澤拓馬, 阿部和久

    第18回鉄道技術・政策連合シンポジウム(J-RAIL2011)  2011.12 

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    Venue:東京都渋谷区  

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  • 2次元スカラー波動問題のためのwavelet時間域境界要素法計算効率における波動入射・境界条件の影響

    菅波祐太, 紅露一寛, 阿部和久

    第29回土木学会関東支部新潟会研究調査発表会  2011.11 

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    Venue:新潟県長岡市  

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  • 下負荷面モデルの材料パラメータの変動がバラスト材の繰り返し変形解析結果に及ぼす影響

    間島朋也, 紅露一寛, 阿部和久

    第29回土木学会関東支部新潟会研究調査発表会  2011.11 

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    Venue:新潟県長岡市  

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  • 時間・空間の離散化にwavelet基底を用いた拡散問題時間域BEMにおける係数行列計算

    佐藤鉄太郎, 紅露一寛, 阿部和久

    第29回土木学会関東支部新潟会研究調査発表会  2011.11 

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  • Number of Non-zero Entries of Coefficient Matrix in Time-Domain Haar wavelet BEM for 2-D Diffusion problems

    2011.10 

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  • 回転硬化を考慮した下負荷面モデルを用いたバラスト材の繰り返し変形解析における材料パラメータの変動の影響

    間島朋也, 紅露一寛, 阿部和久

    土木学会第66回年次学術講演会  2011.9  土木学会

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    Venue:愛媛県松山市  

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  • 時間・境界上の離散化にHaar waveletを用いた拡散問題時間域BEMにおける係数行列計算の効率化

    佐藤鉄太郎, 紅露一寛, 阿部和久

    土木学会第66回年次学術講演会  2011.9  土木学会

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    Venue:愛媛県松山市  

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  • 2次元スカラー波動問題のためのwavelet時間域境界要素法の計算効率に対する境界条件の影響

    菅波祐太, 紅露一寛, 阿部和久

    土木学会第66回年次学術講演会  2011.9  土木学会

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    Venue:愛媛県松山市  

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  • 時間・空間の離散化にwavelet 基底を用いた拡散問題時間域BEMにおける計算効率の改善

    紅露一寛, 佐藤鉄太郎, 阿部和久

    第16回計算工学講演会  2011.5 

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    Venue:千葉県柏市  

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  • バラスト道床沈下解析のためのhypoplasticモデルと時間域均質化法とを用いた有限要素解析法

    紅露一寛, 村松久志, 阿部和久

    第17回鉄道技術連合シンポジウム(J-RAIL2010)  2010.12 

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    Venue:東京都渋谷区  

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  • 有道床バラスト軌道を対象とした繰り返し鉛直・水平載荷試験の弾塑性有限要素解析

    紅露一寛, 阿部和久

    第17回鉄道技術連合シンポジウム講演論文集(J-RAIL2010)  2010.12 

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    Venue:東京都渋谷区  

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  • Cycle-jump型構成モデルによる道床バラスト材の3次元有限要素繰り返し変形解析

    山田啓太, 紅露一寛, 阿部和久

    第17回鉄道技術連合シンポジウム講演論文集(J-RAIL2010)  2010.12 

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    Venue:東京都渋谷区  

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  • 時間・空間の離散化に wavelet基底を用いた境界要素非定常熱伝導解析

    佐藤鉄太郎, 紅露一寛, 阿部和久

    第28回土木学会関東支部新潟会研究調査発表会  2010.11 

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    Venue:新潟県長岡市  

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  • バラスト道床沈下を対象とした cycle-jump型構成モデルによる3次元FEM解析

    山田啓太, 紅露一寛, 阿部和久

    第28回土木学会関東支部新潟会研究調査発表会  2010.11 

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    Venue:新潟県長岡市  

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  • 2次元スカラー波動問題の時間域境界要素解析における非直交 waveletの適用とその効果

    菅波祐太, 紅露一寛, 阿部和久

    第28回土木学会関東支部新潟会研究調査発表会  2010.11 

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    Venue:新潟県長岡市  

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  • 時間・空間の離散化に wavelet基底を用いた時間域境界要素法の2次元拡散問題への適用

    佐藤鉄太郎, 紅露一寛, 阿部和久

    土木学会第65回年次学術講演会  2010.9 

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    Venue:札幌市  

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  • 非直交 waveletを用いた時間域境界要素法による2次元スカラー波動伝播解析の効率化

    菅波祐太, 紅露一寛, 阿部和久

    土木学会第65回年次学術講演会  2010.9 

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    Venue:札幌市  

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  • 鉄道用バラスト材の繰り返し変形解析のための時間域均質化法を援用した有限要素解析法

    紅露一寛, 村松久志, 阿部和久

    第15回計算工学講演会  2010.5 

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  • 下負荷面モデルを用いた弾塑性有限要素法による有道床バラスト軌道の繰り返し変形解析

    紅露一寛, 福津佑太, 東海林裕之, 阿部和久

    第15回計算工学講演会  2010.5 

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  • 拡散問題を対象とした時間域境界要素法における wavelet基底を用いた空間・時間の離散化

    紅露一寛, 佐藤鉄太郎, 阿部和久

    第15回計算工学講演会  2010.5 

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  • 非直交 waveletを用いた時間域境界要素法による非定常波動伝播解析の計算効率

    紅露一寛, 菅波祐太, 阿部和久

    第15回計算工学講演会  2010.5 

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  • 時間・空間の離散化に wavelet基底を用いた時間域境界要素法とその拡散問題への適用

    佐藤鉄太郎, 紅露一寛, 阿部和久

    土木学会関東支部第38回技術研究発表会  2010.3 

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  • Wavelet基底を用いた時間域境界要素法による波動伝播解析における計算効率

    菅波祐太, 紅露一寛, 阿部和久

    土木学会関東支部第37回技術研究発表会  2010.3 

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  • バラスト材の繰り返し変形解析に用いる下負荷面モデルの改良とその効果

    紅露一寛, 福津佑太, 阿部和久

    第16回鉄道技術連合シンポジウム  2009.12 

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    Venue:東京都渋谷区  

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  • 時間域均質化法によるバラスト材の繰り返し変形解析の効率化の試み

    紅露一寛, 村松久志, 阿部和久

    第16回鉄道技術連合シンポジウム  2009.12 

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    Venue:東京都渋谷区  

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  • バラスト材の繰り返し変形解析における cycle-jump型弾塑性構成モデルの適用

    紅露一寛, 山田啓太, 阿部和久

    第16回鉄道技術連合シンポジウム  2009.12 

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    Venue:東京都渋谷区  

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  • 拡張下負荷面モデルを用いたバラスト材の繰り返し変形解析における材料関数の改良

    福津佑太, 紅露一寛, 阿部和久

    第27回土木学会関東支部新潟会研究調査発表会  2009.11 

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    Venue:新潟市  

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  • 道床バラスト材の繰り返し変形解析における cycle-jump型構成モデルの適用可能性と問題点の検討

    山田啓太, 紅露一寛, 阿部和久

    第27回土木学会関東支部新潟会研究調査発表会  2009.11 

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    Venue:新潟市  

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  • 時間域均質化法を援用した弾塑性連続体モデルによるバラスト材の繰返し変形量予測の効率化

    村松久志, 紅露一寛, 阿部和久

    第27回土木学会関東支部新潟会研究調査発表会  2009.11 

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    Venue:新潟市  

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  • Cycle-jump型構成モデルを用いた鉄道用バラスト材の繰り返し変形解析

    山田啓太, 紅露一寛, 阿部和久

    土木学会第64回年次学術講演会  2009.9 

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    Venue:福岡市  

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  • 拡散問題を対象とした時間域境界積分方程式法の計算効率の向上における waveletのゼロモーメント次数の役割

    紅露一寛, 五十嵐和希, 阿部和久

    土木学会第64回年次学術講演会  2009.9 

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    Venue:福岡市  

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  • 個体間の相互作用を考慮した回遊魚の遡上行動モデルの構築

    村松久志, 紅露一寛, 工藤琢也, 阿部和久

    土木学会第64回年次学術講演会  2009.9 

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    Venue:福岡市  

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  • 鉄道用バラスト材の繰返し変形解析に用いる下負荷面モデルの改良の試み

    福津佑太, 紅露一寛, 阿部和久

    土木学会第64回年次学術講演会  2009.9 

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    Venue:福岡市  

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  • 3-D FE simulation of cyclic loading tests of railway ballasted track using subloading surface elastoplastic model International conference

    Kazuhiro Koro, Yuta Fukutsu, Kazuhisa Abe

    International Symposium on Speed-up, Safety and Service Technology for Railway and Maglev Systems 2009(STECH'09)  2009.6 

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    Venue:新潟県新潟市  

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  • スカラー波動問題を対象とした時間域境界要素解析におけるwavelet基底の適用

    紅露一寛, 古川陽, 阿部和久

    第58回理論応用力学講演会  2009.6 

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    Venue:東京都港区  

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  • 魚道を対象とした河川回遊魚の3次元遡上シミュレータの構築

    紅露一寛, 梶原宗光, 阿部和久

    第14回計算工学講演会  2009.5 

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    Venue:東京都渋谷区  

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  • 回遊魚を対象とした個体ベースモデルの遡上行動解析結果に及ぼす流況の違いの影響

    梶原宗光, 紅露一寛, 阿部和久

    第36回土木学会関東支部技術研究発表会  2009.3 

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    Venue:千葉県習志野市  

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  • バラスト材の繰り返し変形解析手法における時間域均質化法の導入

    紅露一寛, 村松久志, 嘉数東陽, 阿部和久

    第15回鉄道技術・政策連合シンポジウム(J-Rail2008)  2008.12 

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    Venue:東京都渋谷区  

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  • バラスト道床の弾塑性連続体モデル化に基づいた3次元繰り返し変形解析

    紅露一寛, 福津佑太, 阿部和久

    第15回鉄道技術・政策連合シンポジウム(J-Rail2008)  2008.12 

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    Venue:東京都渋谷区  

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  • 回遊魚の遡上シミュレーションに対するエージェント法行動選択に基づく個体ベースモデルの適用

    梶原宗光, 高橋飛鳥, 紅露一寛, 阿部和久

    第26回土木学会関東支部新潟会研究調査発表会  2008.11 

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    Venue:長岡市  

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  • 下負荷面モデルによる有道床軌道の繰り返し鉛直載荷試験の有限要素解析

    福津佑太, 紅露一寛, 阿部和久

    第26回土木学会関東支部新潟会研究調査発表会  2008.11 

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    Venue:長岡市  

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  • Hypoplasticモデルにおける時間域均質化法の適用とその定式化

    村松久志, 嘉数東陽, 紅露一寛, 阿部和久

    第26回土木学会関東支部新潟会研究調査発表会  2008.11 

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    Venue:長岡市  

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  • マルチエージェント法行動選択を援用した個体ベースモデルによる回遊魚の遡上行動のモデル化

    紅露一寛, 梶原宗光, 阿部和久

    日本機械学会第21回計算力学講演会  2008.11 

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    Venue:沖縄県西原町  

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  • 鉄道用バラスト材の繰り返し変形解析における時間域マルチスケール法の適用

    村松久志, 嘉数東陽, 紅露一寛, 阿部和久

    土木学会第63回年次学術講演会  2008.9 

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    Venue:仙台市  

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  • エージェント法行動選択に基づく個体ベースモデルに基づく回遊魚の遡上行動解析モデル

    梶原宗光, 高橋飛鳥, 紅露一寛, 阿部和久

    土木学会第63回年次学術講演会  2008.9 

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    Venue:仙台市  

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  • 回転硬化を考慮した下負荷面モデルによる有道床軌道の繰り返し変形解析の試み

    福津佑太, 紅露一寛, 阿部和久

    土木学会第63回年次学術講演会  2008.9 

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    Venue:仙台市  

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  • 繰り返し荷重を受ける鉄道用バラスト材の変形解析への時間域マルチスケール法の適用

    紅露一寛, 嘉数東陽, 村松久志, 阿部和久

    第13回計算工学講演会  2008.5 

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    Venue:仙台市  

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  • 拡散問題を対象としたwavelet境界要素解析とその有効性

    紅露一寛, 石山静香, 阿部和久

    第13回計算工学講演会  2008.5 

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    Venue:仙台市  

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  • 回遊魚の遡上行動を対象としたエージェント法行動選択に基づく個体ベースモデル

    紅露一寛, 梶原宗光, 高橋飛鳥, 阿部和久

    第13回計算工学講演会  2008.5 

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    Venue:仙台市  

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  • 連続体モデルを用いたバラスト道床材の繰り返し変形解析の試み

    紅露一寛, 阿部和久, 嘉数東陽, 梶原宗光

    第14回鉄道技術連合シンポジウム(J-rail2007)  2007.12 

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  • Cyclic deformation analysis of railway ballast using hypoplastic model International conference

    Kazuhiro Koro, Kazuhisa Abe, Toyo Kakazu

    APCOM'07 - EPMESC XI  2007.12  JACM, JSCES, JSME CMD

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    Venue:京都府京都市  

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  • Hypoplasticモデルによるバラスト材の繰り返し変形解析

    嘉数東陽, 紅露一寛, 阿部和久

    第25回土木学会関東支部新潟会研究調査発表会  2007.11  土木学会関東支部新潟会

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  • 鉄道用バラスト材の繰り返し変形挙動解析への下負荷面モデルの適用

    梶原宗光, 紅露一寛, 阿部和久

    第25回土木学会関東支部新潟会研究調査発表会  2007.11  土木学会関東支部新潟会

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  • エージェント法行動選択に基づく個体ベースモデルを用いた3次元魚体泳動解析の試み

    紅露一寛

    第62回土木学会年次学術講演会  2007.9  土木学会

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  • 下負荷面モデルによる鉄道用バラスト材の繰り返し変形解析

    梶原宗光, 紅露一寛, 阿部和久

    第62回土木学会年次学術講演会  2007.9  土木学会

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  • Hypoplasticモデルのバラスト材繰り返し変形解析への適用

    嘉数東陽, 紅露一寛, 阿部和久

    第62回土木学会年次学術講演会  2007.9  土木学会

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  • エージェント法による行動選択に基づく個体ベースモデルによる魚体泳動解析の試み

    紅露一寛

    第12回計算工学講演会  2007.5  日本計算工学会

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  • 鉄道用バラスト材要素試験の弾塑性解析

    嘉数東陽, 紅露一寛, 阿部和久

    第24回土木学会関東支部新潟会研究調査発表会  2006.11  土木学会関東支部新潟会

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  • バラスト材を対象とした大型三軸試験の弾塑性解析

    嘉数東陽, 紅露一寛, 阿部和久

    第61回土木学会年次学術講演会  2006.9  土木学会

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  • 道床・路盤部の解析モデルの違いがレール継目部の衝撃応答解析結果に及ぼす影響

    紅露一寛, 阿部和久, 石田誠, 鈴木貴洋

    第11回鉄道技術連合シンポジウム(J-Rail2004)  2004.12 

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  • Wavelet BEMにおける係数切り捨て手法とその実効性

    阿部和久, 紅露一寛

    日本機械学会第17回計算力学講演会  2004.11  日本機械学会

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  • 車両・軌道系の振動解析に適したTimoshenkoばり有限要素の提案

    紅露一寛, 阿部和久, 石田誠, 鈴木貴洋

    第10回鉄道技術連合シンポジウム(J-rail2003)  2003.12 

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  • 移動集中荷重作用下におけるTimoshenkoばりの振動解析に適した有限要素の構成

    紅露一寛, 阿部和久, 石田誠, 鈴木貴洋

    第21回土木学会関東支部新潟会研究調査発表会  2003.11  土木学会関東支部新潟会

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  • Wavelet BEMの係数切り捨て方法と保存成分数に関する検討

    紅露一寛, 阿部和久

    第8回計算工学講演会  2003.5  日本計算工学会

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  • Wavelet境界要素法における切り捨て基準値の実用的な決定法

    紅露一寛, 阿部和久

    第30回土木学会関東支部技術研究発表会  2003.3  土木学会関東支部

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  • 境界要素法に基づく均質化解析の効率化のためのwavelet基底の利用

    紅露一寛, 阿部和久

    第20回土木学会関東支部新潟会研究調査発表会  2002.11  土木学会関東支部新潟会

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  • Wavelet BEMによる均質化境界要素解析の効率化

    紅露一寛, 阿部和久

    土木学会第57回年次学術講演会  2002.9  土木学会

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  • Wavelet重み付きGauss積分公式の構成とそのwavelet BEMへの適用

    紅露一寛, 阿部和久

    土木学会第56回年次学術講演会  2001.9  土木学会

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  • 非直交waveletを用いた境界要素解析

    紅露一寛, 阿部和久

    第5回計算工学講演会  2000.5  日本計算工学会

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  • Waveletを用いた選点法境界要素方程式の構成

    阿部和久, 紅露一寛, 田崎浩章

    第4回計算工学講演会  1999.5  日本計算工学会

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  • Waveletを用いた境界要素階層型h-法

    紅露一寛, 阿部和久

    土木学会第53回年次学術講演会  1998.10  土木学会

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Awards

  • 土木学会応用力学委員会 第15回応用力学論文賞

    2012.9   土木学会応用力学委員会  

    阿部和久, 荒木聡秀, 紅露一寛

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 第16回土木学会鉄道工学シンポジウム論文奨励賞

    2012.7   土木学会構造工学委員会鉄道工学連絡小委員会  

    紅露一寛, 間島朋也, 阿部和久

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 土木学会応用力学委員会 第14回応用力学論文賞

    2011.9   土木学会  

    阿部和久, 中山悠, 紅露一寛

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • 日本計算工学会 第12回計算工学講演会 ベストペーパーアワード

    2008.3   日本計算工学会  

    阿部和久, 風間俊輔, 紅露一寛

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 土木学会構造工学委員会 第51回構造工学シンポジウム論文賞(土木部門)

    2005.5   土木学会構造工学委員会  

    阿部和久, 紅露一寛

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • 土木学会応用力学委員会 第6回応用力学論文賞

    2004.9   土木学会応用力学委員会  

    紅露一寛, 阿部和久

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • 平成10年度土木学会全国大会第53回年次学術講演会 優秀講演者表彰

    1998.11   土木学会  

    紅露一寛

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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Research Projects

  • Effect of grid-type sleepers on suppression of ballast settlement around rail joints

    Grant number:22K04282

    2022.4 - 2025.3

    Koro, K.

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  • レール継目部用弾性まくらぎ導入区間の軌道動的応答に関する解析的検討

    2020.4 - 2021.3

    Awarding organization:(公財)鉄道総合技術研究所 共同研究(国内共同研究)

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  • Research on ballast settlement behavior of curved railway track

    Grant number:19K04572

    2019.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Koro Kazuhiro

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    Authorship:Principal investigator 

    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    We developed a FE-based simulation method for ballast settlement of curved railway track in consideration of track vibration. We investigated the mechanism on cyclic deformation of ballast layer in a curved track with cant deficiency or cant excess, through the numerical tests using the simulation method. The sensitivity of the spatial variation of material- or shape parameters of ingredients of railway track was evaluated through the ballast settlement- or vibration analysis of ballasted railway track using the stochastic FEM.

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  • 弾性まくらぎ導入区間のレール継目部周辺の軌道動的応答と道床沈下進みに関する解析的検討

    2018.7 - 2019.3

    Awarding organization:(公財)鉄道総合技術研究所 共同研究(国内共同研究)

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  • 普通継目部周辺のまくらぎ下弾性化による軌道動的応答の変化の検討

    2017.7 - 2018.3

    System name:共同研究(国内共同研究)

    Awarding organization:(公財)鉄道総合技術研究所

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    Grant type:Competitive

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  • バラスト材の繰り返し変形挙動の弾塑性連続体モデル化の有用性向上に関する研究

    2016.7 - 2017.3

    System name:共同研究(国内共同研究)

    Awarding organization:(公財)鉄道総合技術研究所

    紅露一寛

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    Authorship:Principal investigator  Grant type:Competitive

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  • バラスト材の繰り返し弾塑性解析の適用性に関する研究

    2015.12 - 2016.3

    System name:共同研究(国内共同研究)

    Awarding organization:(公財)鉄道総合技術研究所

    紅露一寛

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  • 軌道剛性急変箇所を対象とした道床沈下解析法の開発と沈下メカニズムの解明

    2015.4 - 2018.3

    System name:科学研究費助成事業

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

    紅露一寛

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3600000 ( Direct Cost: \2520000 、 Indirect Cost:\1080000 )

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  • 連続体モデルによるバラスト道床の繰り返し変形挙動の定量評価に関する総合的検討

    2009.4 - 2012.3

    System name:科学研究費助成事業

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

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    Grant type:Competitive

    Grant amount:\1400000 ( Direct Cost: \980000 、 Indirect Cost:\420000 )

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  • 繰り返し載荷時のバラスト道床沈下を対象とした高精度・高効率な沈下量予測手法の開発

    2007.4 - 2009.3

    System name:科学研究費助成事業

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

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    Grant type:Competitive

    Grant amount:\1000000 ( Direct Cost: \700000 、 Indirect Cost:\300000 )

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Teaching Experience (researchmap)

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Teaching Experience

  • 都市インフラを考える

    2023
    Institution name:新潟大学

  • 総合工学概論

    2021
    Institution name:新潟大学

  • 社会基盤製図

    2020
    Institution name:新潟大学

  • 卒業研究

    2020
    Institution name:新潟大学

  • 卒業研修

    2020
    Institution name:新潟大学

  • リフレクションデザインIII

    2020
    Institution name:新潟大学

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    Level:Undergraduate (specialized) 

  • 社会基盤設計基礎

    2018
    Institution name:新潟大学

  • 社会基盤工学実験I

    2018
    Institution name:新潟大学

  • 工学リテラシー入門(力学分野)

    2017
    Institution name:新潟大学

  • 数物演習

    2017
    Institution name:新潟大学

  • 領域概説 E (工学)

    2017
    -
    2020
    Institution name:新潟大学

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    Level:Undergraduate (specialized) 

  • リフレクションデザインII

    2017
    -
    2020
    Institution name:新潟大学

  • 水理学実験

    2017
    -
    2019
    Institution name:新潟大学

  • 技術英語II

    2012
    Institution name:新潟大学

  • 工学リテラシー入門(建設学科)

    2009
    -
    2016
    Institution name:新潟大学

  • 社会基盤工学概論

    2008
    Institution name:新潟大学

  • 社会基盤プロジェクト・マネージメント

    2008
    Institution name:新潟大学

  • 社会基盤応用数理及び演習II

    2008
    Institution name:新潟大学

  • 社会基盤数理工学

    2007
    Institution name:新潟大学

  • 社会基盤応用数理及び演習I

    2007
    Institution name:新潟大学

  • 社会基盤基礎設計

    2007
    -
    2017
    Institution name:新潟大学

  • くらしと環境

    2007
    -
    2016
    Institution name:新潟大学

  • 環境シミュレーション学特論

    2006
    Institution name:新潟大学

  • 環境・災害モデリング

    2006
    Institution name:新潟大学

  • 測量学

    2006
    -
    2011
    Institution name:新潟大学

  • 応用力学演習I

    2004
    Institution name:新潟大学

  • 応用力学II

    2004
    Institution name:新潟大学

  • 卒業研修又は基礎設計

    2004
    -
    2019
    Institution name:新潟大学

  • 材料・構造実験

    2004
    -
    2017
    Institution name:新潟大学

  • 測量学実習

    2004
    -
    2014
    Institution name:新潟大学

  • スタディスキルズ(建設)

    2004
    -
    2008
    Institution name:新潟大学

  • 応用力学演習II

    2003
    Institution name:新潟大学

  • 卒業研究又は設計

    2003
    -
    2019
    Institution name:新潟大学

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