考虑客车平顺性的悬架参数优化设计

Suspension Parameters Optimization Design Based on Ride Comfort of Buses

基于车辆系统动力学分析与最优化设计,按照客车行驶平顺性的评价标准,选取后桥上方乘客的加权加速度均方根值为评价指标,根据前、后悬架偏频的设计要求和前、后悬架频率的匹配关系,根据汽车的阻尼比、动挠度、动载荷的设计要求,优化前、后悬架的刚度值与阻尼值,使得加权加速度均方根值最小。仿真结果表明:原车的行驶平顺性得到了改善。

Based on the dynamic analysis and optimization technique of vehicle, root-mean-square value of the passenger over the rear axle is selected as comfort evaluation indices on the basis of the estimate standard of ride comfort. According to the demand for design of damping ratio, dynamic flexibility, dynamic load, inherent frequency of fore-and-aft suspensions and the matching between natural frequencies of fore-and-aft suspensions, the root-mean-square value is minimized by optimization of fore-and-aft suspensions＇ stiffness and damping value. The simulation result shows that the ride comfort of the bus has been greatly improved.