Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Aluminum Space Frame B.I.W. Optimization Considering Multidisciplinary Design Constraints

다분야 설계 제약 조건을 고려한 알루미늄 스페이스 프레임 차체의 최적 설계

  • Kim Bum-Jin (Vehicle CAE Team, Hyundai Motor Company) ;
  • Kim Min-Soo (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Heo Seung-Jin (School of Mechanical and Automotive Engineering, Kookmin University)
  • 김범진 (현대자동차 차량해석팀) ;
  • 김민수 (국민대학교 기계자동차공학부) ;
  • 허승진 (국민대학교 기계자동차공학부)
  • Published : 2006.01.01
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Abstract

This paper presents an ASF (Aluminum Space Frame) BIW optimal design, which minimizes the weight and satisfies multi-disciplinary constraints such as the static stiffness, vibration characteristics, low-speed crash, high-speed crash and occupant protection. As only one cycle CPU time for all the analyses is 12 hours, the ASF design having 11-design variable is a large scaled problem. In this study, ISCD-II and conservative least square fitting method is used for efficient RSM modeling. Then, ALM method is used to solve the approximate optimization problem. The approximate optimum is sequentially added to remodel the RSM. The proposed optimization method used only 20 analyses to solve the 11-design variable design problem. Also, the optimal design can reduce the] $15\%$ of total weight while satisfying all of the multi-disciplinary design constraints.

Keywords

References

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