摘要
为在电动汽车车身概念设计阶段得到合理的承载结构,综合考虑静动态特性,进行了多目标拓扑优化。基于带惩罚的实体各向同性材料(SIMP)理论,采用折衷规划法定义静态多工况目标函数,用平均频率法定义动态振动频率目标函数,并通过对各目标函数归一化消除其数量级差异;利用优化准则法更新设计变量进行优化迭代,得到同时满足静态刚度和动态振动频率要求的电动汽车车身拓扑结构。
For obtaining a rational load bearing structure of electric car body in conceptual design phase, a multi-objective topology optimization is performed with consideration of both static and dynamic characteristics. Based on solid isotropic material with punishment （SIMP） theory, the objective functions for multi-static-conditions and dynamic vibration frequency are defined by compromise programming and average frequency methods respective- lyand are to update normalized to eliminate the discrepancy in the order of magnitude. The optimality criteria method is used design variables, and a topological structure of electric car body meeting both requirements of static stiff- ness and dynamic vibration frequency is finally obtained by optimization iteration.
出处
《汽车工程》
EI
CSCD
北大核心
2013年第7期583-587,共5页
Automotive Engineering
