关键词: 多目标优化；近似模型管理；耐撞性优化；车身薄壁构件

Abstract:

A multi-objective optimization method based on the trust region model management framework was suggested to reduce the dependence on the approximations.In each optimization iteration,the approximation models were constructed by the quadratic response surface approximation technique with the samples obtained from the Latin hypercube design.And a Pareto optimal frontier predicted by the approximations was identified through the micro multi-objective genetic algorithm,and the trust region model management framework was employed to manage the approximations.Eventually, the present method is successfully applied in the thin-walled sections for structural crashworthiness.

Key words: multi-objective optimization;approximation model management;optimization of structural crashworthiness;thin-walled section