Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Weight-reduction Design Method by Underframe Material Substitution in a Box-type Bodyshell with Cut-outs

Cut-out이 있는 Box형 차체의 하부구조 소재대체 경량화 설계 방법

  • Cho, Jeonggil (Department of Rolling Stock Engineering, Seoul National University of Science & Technology) ;
  • Koo, Jeongseo (Department of Rolling Stock Engineering, Seoul National University of Science & Technology) ;
  • Jung, Hyunseung (New Transportation Systems Research Center, Korea Railroad Research Institute)
  • 조정길 (서울과학기술대학교 철도차량시스템공학과) ;
  • 구정서 (서울과학기술대학교 철도차량시스템공학과) ;
  • 정현승 (한국철도기술연구원 신교통연구본부)
  • Received : 2012.02.17
  • Accepted : 2012.08.24
  • Published : 2013.03.01
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Abstract

In this paper, a theoretical weight-reduction method was suggested to substitute an underframe material of a box-type bodyshell having cut-outs with an alternative light-weight material. To utilize the material substitution method previously developed for a box-type hybrid bodyshell not having cut-outs, we derived a box-type baseline model without cut-outs which is similar to the stiffness condition of a box-type bodyshell having cut-outs. To do this, the thicknesses of roof and walls of the baseline model were determined such that the deflection of the baseline model under a distributed vertical load condition is equal to the sum of the theoretical section deflections of the original box model with cut-outs. Next, to derive a hybrid bodyshell by under-frame material substitution, the material substitution method for a box-type hybrid bodyshell without cut-outs was applied to the box-type baseline model. Finally, we compared the FE simulation results of the derived hybrid bodyshells having cut-outs for various materials with the theoretical results of the suggested method, and we obtained their good correlations.

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References

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