为了探索适用于电动汽车特点且满足性能要求的车身结构，该文在白车身概念设计阶段，建立新的底盘三维拓扑优化设计空间。基于变密度拓扑优化方法中的各向同性固体材料惩罚函数法(SIMP)，考虑到电动汽车车身结构与传统燃油车相比存在的诸多差异，针对弯曲、扭转、正面碰撞和追尾4个工况，分别制定了优化目标，开展单目标拓扑优化设计，得到电动汽车底盘结构中最优的载荷传递路径以及各支架之间的空间连接方式。结果表明：该优化设计满足电动汽车设计要求，可为车身结构下一步详细设计和其它车型的车身开发提供参考依据。%A new 3-D topology optimization design space of chassis was constructed in the conceptual design stage of an electric vehicle white body to develop the body structure which satisifes the characteristics and requirements of electric vehicle. Single objective topology optimization designs of bending, torsion, and crash conditions were conducted respectively using topology optimization method based on Solid Isotropic Material with Penalization (SIMP), considering the differences of body structure between electric and combustion-engine automobile. The optimal load transmitting path and the connections of supports for chassis were obtained. The results show that the optimization can meet the design requirements and provide proposal for the detailed design in the next stage or other electric vehicle models.
展开▼
