聚双环戊二烯发动机罩结构优化设计

Structural Optimization Design of Polydicyclopentadiene Bonnet

摘要:

以某乘用车发动机罩为例，建立聚双环戊二烯（PDCPD）发动机罩的结构优化设计方法流程，实现结构设计轻量化。试验测得PDCPD的材料属性数据，应用等刚度等强度计算-拓扑优化-形貌优化-多目标参数优化的设计流程，实现多种工况下的结构优化设计。性能分析结果表明，相较于原始钢制发动机罩，应用此方法流程设计的PDCPD发动机罩能够获得较显著的力学性能提升，同时轻量化效果明显。

Abstract:

Taking the engine cover of a passenger car as an example， the structure optimization design method flow of Polydicyclopentadiene （PDCPD） engine cover was established to realize the lightweight structure design. The material property data of PDCPD were measured in the experiment， and the design process of equal stiffness and equal strength calculation-topology optimization- morphology optimization?multi-objective parameter optimization was applied to the structural optimization design under various working conditions. The performance analysis results show that compared with the original steel engine cover， the PDCPD engine cover designed by this method can achieve significant mechanical performance improvement， and the lightweight effect is obvious.