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김정호(Jungho Kim),김태욱(Taeuk Kim),김용석(Youngsuk Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently customers’ interest for high-efficient and safer vehicle has been increasing. In addition, safety and emission requirements have become more severe than before the last decades in the world. Therefore, the key issues for the automotive companies could be summarized with mass, cost and performance to satisfy the customers’ needs. In this paper, multi-disciplinary optimization is conducted to minimize mass considering Safety crashworthiness, Body stiffness and NVH performance simultaneously with GM proprietary optimizer, ASPEN. And evaluation of the constraints effect for NVH loadcases like as A/T, P/F and IDLE which could not be defined as single number constraint is conducted as well. Totally 162 parts are considered as design variables and 8 Safety, 2 Body CAE and 4 NVH CAE loadcases are included for MDO constraint. Finally, through the 1956 initial runs using ASPEN DOE and 1760 iteration runs derived from RSM, 11.37kg mass reduction was shown with maintaining or enhancing current performance for each loadcases.