汽车悬架控制臂多目标拓扑优化设计

Multi-objective Topology Optimization Design of Automobile Suspension Control Arm

为了实现悬架控制臂的轻量化,利用动力学分析软件对控制臂三种典型工况进行模拟路试,提取关键硬点的载荷作为边界条件,采用折衷规划法建立综合目标函数,运用灰色关联分析法分配各工况权重系数,对悬架控制臂进行拓扑优化;根据拓扑优化的结果对控制臂进行二次设计。分析结果表明,改进后的控制臂的刚度和强度性能均能满足要求,控制臂减重16.5%,实现了轻量化的目的。

In order to realize the lightening of control arm,the dynamic analysis software was used to simulate the road test of three typical working conditions of the control arm.The load of the key hard points was extracted as boundaryconditions.The comprehensive objective function was established tooptimize the topological design of the control arm,by using the compromise programming method to normalize the sub-objectives,and the weight coefficient of sub-objectives was evaluated by using the grey relational analysis method.According to the results of topological optimization,the control arm was designed again.The analysis results show that the stiffness and strength of the improved control arm meet the requirements,and the control arm weight is reduced by16.5%.The design realizes the purpose of lightweigh.