衬套型橡胶悬置结构形状的优化方法

Optimization method of structure shape of bushing rubber mount

为满足汽车动力总成悬置系统匹配过程中悬置的刚度要求,对悬置中非橡胶填充结构进行优化设计,以长槽的半径r,圆槽的半径R,两槽间的夹角α,长槽的角度β为结构参数,采取正交试验与ABAQUS有限元软件结合的方法,对橡胶悬置刚度进行仿真试验。根据试验结果建立二阶响应面模型,通过谢菲尔德遗传算法进行优化,从而获取非橡胶填充结构参数以满足悬置刚度要求。优化结果与试验验证误差较小,满足设计要求。该方法在橡胶悬置设计阶段具有参考意义。

Here,to meet mount stiffness requirements in matching process of automotive powertrain mount system,the non-rubber filled structure in a mount was optimized taking long groove radius r,circular groove radius R,angle between two groovesαand long groove angleβas structural parameters.the rubber mount stiffness was simulated adopting the combination of orthogonal tests and the finite element software ABAQUS.According to test results,the second-order response surface model was established and optimized with Sheffield genetic algorithm to obtain parameters of the non-rubber filled structure,and meet requirements of suspension stiffness.It was shown that the error between the optimized results and the test verification is smaller to meet design requirements;this optimization method has reference significance in design stage of rubber mounts.