摘要
本研究针对电动汽车一体式前机舱复杂薄壁结构设计,提出了一种基于拓扑优化的结构性能协同设计方法。研究通过拓扑优化确定多重负载条件下的最优载荷路径,并进行前机舱一体压铸部件工艺可行性设计。对压铸材料进行了材料测试并开发了基于应力三轴度和罗德角系数应力状态的失效曲面,搭建了正面碰撞简化模型用于评估前机舱集成结构挤压型材纵梁与压铸部件的刚度匹配。结果表明,采用该设计方法可以有效获得多性能约束下的拓扑路径,充分考虑前机舱结构工艺可行性及结构性能匹配,降低研发成本。
For the complex thin-walled structure design of the integrated front engine compartment of electric vehicles,a structure and performance collaborative design method based on topology optimization is proposed in this paper.The optimal load path under multiple load conditions is determined through topology optimization and feasibility design of the front engine compartment integrated die-casting component process is conducted.Material testing is conducted on the die-cast materials,and failure surfaces are developed based on stress triaxiality and Lode angle coefficient stress states.A simplified frontal collision model is constructed to assess the stiffness compatibility between the extruded longitudinal beams and the die-cast components within the integrated front compartment structure.The results show that the proposed design method can effectively obtain topological paths under multiple performance constraints,fully consider the feasibility of the front cabin structure process and structural performance matching,and reduce research and development cost.
作者
孟宪明
任鹏飞
张赛
Meng Xianming;Ren Pengfei;Zhang Sai(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300)
出处
《汽车工程》
EI
CSCD
北大核心
2024年第12期2173-2180,共8页
Automotive Engineering
关键词
多性能拓扑优化
前机舱集成设计
一体化压铸
断裂本构模型
multi-performance topology optimization
front cabin integrated design
integrated die casting
fracture constitutive model
