Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Modeling Method for the Force and Deformation Curve of Energy Absorbing Structures to Consider Initial Collapse Behaviour in Train Crash

열차 충돌에너지 흡수구조의 초기붕괴특성을 고려하기 위한 하중-변형 곡선 모델링 방법

  • Kim, Joon-Wo (Department of Rolling Stock System, Seoul National University of Technology) ;
  • Koo, Jeong-Seo (Department of Rolling Stock System, Seoul National University of Technology) ;
  • Lim, Jong-Soon (Technical Center, ILJIN Global)
  • 김준우 (서울산업대학교 철도차량시스템공학과) ;
  • 구정서 (서울산업대학교 철도차량시스템공학과) ;
  • 임종순 (일진글로벌)
  • Received : 2009.08.27
  • Accepted : 2009.11.05
  • Published : 2010.05.01
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Abstract

The Korean rolling stock safety regulation stipulates that the collision deceleration of a car body should be maintained under average 5g and maximum 7.5g during train collisions. One-dimensional dynamic model of a full rake train, which is made up of nonlinear springs/bars-dampers-masses, is often used to estimate the collision decelerations of car bodies in a basic design stage. By the way, the previous studies have often used some average force-deformation curve for energy absorbing structures in rolling stock. Through this study, we intended to analyse how much the collision deceleration levels are influenced by the initial peak force modeling in the one-dimensional force-deformation curve. The numerical results of the one-dimensional dynamic model for the Korean High-Speed Train show that the initial peak force modeling gives significant effect on the collision deceleration levels. Therefore the peak force modeling of the force-deformation curve should be considered in one-dimensional dynamic model of a full rake train to evaluate the article 16 of the domestic rolling stock safety regulations.

Keywords

References

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