多工况下汽车发动机支架静动态拓扑优化设计

Static-dynamic Combined Topology Optimization of Vehicle Engine Bracket under Multiple Driving Conditions

为实现汽车结构件轻量化优化设计,将结构拓扑优化技术引入到发动机支架设计中,并采用多工况下静动态联合拓扑优化技术对其进行拓扑优化分析,同时给出拓扑优化结果解读思路和方法。通过优化后的发动机支架在结构耐久、模态和强度均满足设计要求的同时实现轻量化,表明拓扑优化技术在汽车结构轻量化优化设计中的有效性和可靠性。

In order to achieve vehicle structure lightweight design, topology optimization technique is introduced in the design of engine bracket; besides, static-dynamic combined topology optimization technique is applied in multiple driving conditions for topological optimization analysis, meanwhile, thoughts and methods to interpret the topology optimization results are given. The optimized lightweight engine bracket meets the design requirement in structural durability, modal and strength, indicating that the topology optimization technique is proved valid and feasible in vehicle structure lightweight design.