减振器活塞阻尼孔的优化设计

Optimization Design of Piston Damping Hole in Shock Absorber

研究了减振器的工作原理与减振器活塞的结构参数,分析了活塞阻尼孔的节流压力,确定了活塞阻尼孔优化的设计变量。对设计变量进行三因素三水平的正交试验,并进行了基于中心复合实验的试验点的设计,对每组试验点建立数字模型,并进行流固耦合数值仿真。通过分析正交实验所得到的结果,对活塞阻尼孔进行响应面优化设计,对设计变量和目标函数进行了响应面拟合以及拟合精度验证,并对设计变量进行了方差分析,确定了各设计变量对结果的影响程度,通过遗传优化算法,对设计变量的参数进行了确定;通过正交试验,研究了活塞阻尼孔的各设计变量对目标函数的影响程度,并基于响应面法进行结构参数的优化。研究结果对于活塞阻尼孔的优化设计有着重要的指导意义。

This paper studies the working principle of shock absorber and the structural parameters of shock absorber piston,analyzes the throttle pressure of piston damping hole,and determines the design variables of piston damping hole optimization.Orthogonal tests with three factors and three levels were carried out on the design variables,and the test points were designed based on the central composite experiment.A digital model was established for each group of test points,and the fluid-structure coupling numerical simulation was carried out.After comprehensive analysis of the results of orthogonal experiments,response surface optimization was carried out on the piston damping hole design,design variables and objective function for the response surface fitting,and the fitting precision was verified,and the analysis of variance has been made to design variables,determine the impact of the results of each design variable,genetic algorithm was optimized,the parameters of the design variables were determined.In this study,the influence of each design variable of piston damping hole on the objective function is studied by orthogonal test,and the structural parameters are optimized based on the response surface method,which has important guiding significance for the optimization design of piston damping hole.