Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Equivalent Modeling Technique for 1-D Collision Dynamics Using 3-D Finite Element Analysis of Rollingstock

열차의 3차원 유한요소해석을 이용한 1차원충돌 동역학 등가 모델링 기법

  • 박민영 (서울산업대학교 산업대학원 기계설계학과) ;
  • 박영일 (서울산업대학교 기계설계자동화공학부) ;
  • 구정서 (서울산업대학교 철도전문대학원 철도차량시스템공학과)
  • Received : 2010.01.27
  • Accepted : 2010.02.23
  • Published : 2010.04.26
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Abstract

In this study, a new equivalent modeling technique of rollingstock for 1-D collision dynamics was proposed using crash analysis of 3-D finite element model in some detail. To obtain good simulation results of 1-D dynamic model, the force-deformation curves of crushable structures should be well modelled with crash analysis of 3-D finite element model. Up to now, the force-deformation curves of the crushable structures have been extracted from crash analyses of sectionally partitioned parts of the carbody, and integrated into 1-D dynamic model. However, the results of the 1-D model were not satisfactory in terms of crash accelerations. To improve this problem, the force-deformation curves of the crushable structures were extracted from collision analysis of a simplified train consist in this study. A comparative study applying the suggested technique shows in good agreements in simulation results between two models for KHST.

본 연구에서는 복잡한 3차원 유한요소모델 충돌거동과 등가인 1차원 동역학 모델링 방법을 개발하기 위하여 새로운 1-D 모델링 방법을 제안하였다. 충돌 거동을 잘 일치시키기 위해서는 충돌 시너지를 주로 흡수하는 압괴 구간의 특성을 정확하게 모델링하는 것이 중요하다. KHST 편성차량을 대상으로 3차원 유한요소 모델의 차체단면에 설정한 단면 옵션으로 충돌해석 시 차체 단면에 작용하는 충격하중과 변형을 추출하여 새로운 1차원 충돌동역학 모델의 스프링요소 특성으로 모델링하고, 국내철도차량 안전기준의 열차 대 열차 충돌사고 각본으로 수치해석을 수행하였다. 두 모델의 에너지 흡수량, 충돌 가속도, 충격하중-변형 등을 비교한 결과가 잘 일치하였다.

Keywords

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