4 结论

1）利用动力学分析与拓扑优化问题相结合的方法，利用HyperMesh建立摆臂有限元模型，在多体动力学软件中建立摆臂为柔性体的车辆刚-柔耦合动力学模型，获得了用于摆臂拓扑优化的载荷边界条件；

2）建立了悬架摆臂的多目标优化模型，在悬架摆臂静态多工况条件下柔度减小的同时，使动态振动低阶频率增大，实现了悬架摆臂的多目标拓扑优化。该方法也适用于其它连续体结构的多目标拓扑优化。

参考文献

[1] 张胜兰等.基于HyperWorks的结构优化设计技术[M].北京：机械工业出版社,2008,10.

[2] 祝小元等.汽车悬架控制臂的多目标拓扑优化[J].汽车工程,2011,33(2),138-141.

[3] 范文杰等.汽车车架结构多目标拓扑优化方法研究[J].中国机械工程,2008,19(12),1505-1508.

Multi-Objective Topology Optimization for ControlArm of Vehicle Suspension Based on OptiStruct

Xue Jinlu    Wang Hongyan    Chi Baoshan

Abstract: A multi-objective topology optimization for the control arm of vehicle suspension is conducted with the compliance (static state) under multi-conditions and the natural frequency of vibration (dynamic state) as objective functions. Based on the SIMP method of topology optimization, firstly the frequency optimization under free vibration condition and then the compliance optimization at static condition are performed in sequence. Finally, a topological structure of control arm is obtained meeting the both requirements of minimum compliance at static state and highest low order frequency under dynamic vibration.

Keywords: Suspension; Topology Optimization; SIMP; Frequency; Compliance