关键词: 多学科设计优化；逐步回归响应面；轻量化；最优拉丁方

Abstract:

Sampling points were obtained by using optimal Latin hypercube design of experimental method, meantime, in order to improve computing efficiency ,application of stepwise regression response surface approximate method in the MDO system of the vehicle crashworthiness and free mode of Body-In-White(BIW), the approximate model was optimized by using sequential quadratic programming method. It avoids to consume much of computing time in the traditional method and slow convergence or no convergence in the non- linear impact system. At last, it lightens the weight of the full vehicle in meeting the requirements of regulation CMVDR294 and improves first torsion mode frequency the BIW vehicle.

Key words: multidisciplinary design optimization；stepwise regression response surface；lightweight；optimal Latin hypercube