Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Crashworthiness Optimization of Front Side Members using Bead Shape Optimization

비드 형상 최적화를 이용한 전방 측면 부재의 충돌 최적화 연구

  • Lee, Jun-Young (Graduate School of Automotive Engineering, Kookmin Univ.) ;
  • Lee, Jung-Suk (Graduate School of Automotive Engineering, Kookmin Univ.) ;
  • Lee, Yong-Hoon (Graduate School of Automotive Engineering, Kookmin Univ.) ;
  • Bae, Bok-Soo (Graduate School of Automotive Engineering, Kookmin Univ.) ;
  • Kim, Kyu-Hak (Graduate School of Automotive Engineering, Kookmin Univ.) ;
  • Yim, Hong-Jae (Graduate School of Automotive Engineering, Kookmin Univ.)
  • 이준영 (국민대학교 자동차공학 전문대학원) ;
  • 이정석 (국민대학교 자동차공학 전문대학원) ;
  • 이용훈 (국민대학교 자동차공학 전문대학원) ;
  • 배복수 (국민대학교 자동차공학 전문대학원) ;
  • 김규학 (국민대학교 자동차공학 전문대학원) ;
  • 임홍재 (국민대학교 자동차공학 전문대학원)
  • Received : 2011.04.18
  • Accepted : 2012.01.11
  • Published : 2012.03.01
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Abstract

In this study, the front side member is optimized using a topography optimization technique. Optimization of a simple beam is conducted before optimization of the front side member. The objective function is set to minimize the first buckling factor in the longitudinal direction. The design variable corresponds to the perturbation of nodes normal to the shell's mid-plane space. The crash analysis is conducted on a simple beam, which is optimized by Response Surface Method and the topography optimization technique. In order to verify the topography optimization technique, the results of the RSM and topography optimization model are compared. Consequently, we confirm the satisfactory performance of the topography optimization technique, and apply this topography optimization to the front side member. Thus, the front side member is optimized and its crashworthiness is increased.

본 논문은 위상최적화 기법을 이용하여 전방측면 부재를 최적화 한다. 전방측면 부재에 최적화를 진행하기 전에 사각단면 부재에 최적화를 진행한다. 목적함수는 1 차 좌굴 계수가 길이방향으로 최소화되도록 설정한다. 설계변수는 법선방향으로 질점의 이동이다. 사각단면부재의 반응표면법을 이용한 최적화 모델과 위상최적화 모델에 대해 충돌해석을 수행한다. 위상최적화 기법을 검증하기 위해 두 결과를 비교한다. 그 결과 위상최적화 기법을 충돌해석에 적용할 수 있다는 것을 확인하고 실제차량의 전방측면부재에 적용한다. 결과적으로 전방측면 부재는 최적화되고 내충격성이 향상한다.

Keywords

References

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