野战火箭炮装填系统柔性机构多目标拓扑优化

Optimizing Multi-objective Topology of Compliant Mechanism of Field-artillery Rocket Loading System

采用多目标拓扑优化方法研究了满足野战火箭炮装填系统工作要求的柔性机构材料分布。以实体各向正交材料惩罚函数为拓扑优化方法(SIMP方法),采用加权系数法定义固有频率目标函数,并应用折衷规划法定义静态刚度和动态振动频率多目标拓扑优化函数。以等效力载荷模拟空载工况,以位移载荷模拟负载工况。通过HyperWorks进行优化,得到了同时满足柔性机构空载刚度、负载柔度和低阶振动频率要求的拓扑结构。对优化后的柔性机构进行仿真分析,验证了优化结果的有效性。

A multi-objective topological optimization method was used to study the material distribution of a compliant mechanism that satisfies the requirements of a field-artillery rocket loading system.The solid isotropic material with penalization was used as the topological optimization method.The weighted coefficient method was used to define the natural frequency objective function.The compromise programming method was used to define the multi-objective topology optimization function of static stiffness and dynamic vibration frequency.No-load condition is simulated with equal-force load,and load condition is simulated with displacement load.a topology that simultaneously meets the requirements of stiffness in no-load,flexibility in load and low-order vibration frequency of the compliant mechanism is obtained through the optimization with the HyperWorks.Finally,the simulation analysis of the optimized compliant mechanism is carried out,and the effectiveness of the optimization results is verified.