基于ESO-GA多层次优化策略的减振器拓扑优化研究

Topology Optimization of Vibration Damper Based on ESO-GAMulti-level Optimization Strategy

橡胶减振器的减振性能与胶料性能、几何形状、所受工况、被减振物的动力特性等密切相关。在被减振物及其所受工况确定的条件下,为快速确定橡胶减振器的几何形状与减振性能的关系,探究了一种多层次的优化策略,提出了一种使橡胶减振器具有最佳减振性能的拓扑优化设计方法。首先,基于渐进结构优化法(ESO)建立了橡胶减振器在指定工况下的拓扑优化模型;其次,将拓扑优化结果转化为可用参数度量的有限元模型,即建立基于APDL参数化建模技术的有限元模型;最后,建立可量化的减振性能最优化目标函数,基于遗传算法(GA)与VC++对ANSYS的二次开发技术,可快速求出使减振器具有最佳减振性能时所对应的最优几何参数解。该多层次拓扑优化策略对其他结构的优化设计具有借鉴意义。

The vibration reduction performance of rubber damper is closely related to the rubber properties,geometric shape,working condition and dynamic characteristics of the vibration control objective.In order to quickly determine the relationship between the geometric shape of the rubber damper and its vibration reduction performance,a multi-level optimization strategy is studied,and a topology optimization design method is proposed to improve the vibration reduction performance of the rubber damper.Firstly,based on the evolutionary structural optimization(ESO)method,the topology optimization model of the rubber damper in the given experiment condition is established.Then,the topology optimization result is transformed into a finite element model which can be measured by parameters,that is,a finite element model based on APDL parametric modeling technology is established.Finally,a quantifiable optimization objective function of vibration reduction performance is established,and based on genetic algorithm(GA)and the secondary development technology of ANSYS with VC++,the optimal geometric parameters solution corresponding to the optimal vibration reduction performance of the vibration damper could be obtained quickly.The multi-level topology optimization strategy has reference significance for the optimization design of other structures.