关键词: 多学科设计优化； NVH；近似模型；拉丁方试验设计

Abstract:

Sampling points were obtained by using Latin hypercube design of experimental method.In order to improve computing efficiency,a response surface
method was employed to construct highly nonlinear crash and torsion mode functions.
Response surface approximate functions were optimized by using multidisciplinary design feasible(MDF) and sequential response surface methods were adopted to avoid much of computing time consume in the traditional optimization method and slow convergence or no convergence in the non- linear impact and NVH systems.It improves first torsion mode frequency of the Body-In-White(BIW) vehicle and safety，comfort and smooth performance of the full vehicle in meeting the requirements of regulation CMVDR294.

Key words: multidisciplinary design optimization； noise,vibration and harshness(NVH)；approximate model;Latin hypercube design of experiment