多连杆悬架硬点坐标和衬套刚度优化分析  

Optimization Analysis of Hard Point Coordinates and Bushing Stiffness of Multi-link Suspension

作　　者：张翔 叶宇翔 Zhang Xiang;Ye Yuxiang(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海市200093

出　　处：《农业装备与车辆工程》2021年第5期63-67,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：以某轿车多连杆后悬架为研究对象,通过ADAMS,Isight和MATLAB联合仿真,对影响悬架K特性的硬点坐标和影响悬架C特性的衬套进行灵敏度分析,然后选取对悬架K&C特性影响较大的硬点坐标和衬套刚度作为设计变量,以悬架K&C特性参数为优化目标,采用NSGA-II算法,对硬点坐标和衬套刚度进行多目标优化。优化后,在车轮进行上下平行跳动过程中,多连杆悬架的前束角、外倾角、轮距、轴距变化的范围和最大值都有一定程度的减小;车轮在受到侧向力、纵向力、回正力矩时,车轮前束角、外倾角、轮距、轴距变化范围减小。Taking multi-link rear suspension of a certain car as the research object,by ADAMS,iSight and MATLAB simulation,the sensitivity analysis is carried out on the hard point coordinates which affect the K-characteristics of suspension and the bushing which affects the C characteristics of suspension.Then,the hard point coordinates and the stiffness of the bushing which have great influence on the K&C characteristics of the suspension are selected as the design variables,and the K&C characteristic parameters of the suspension as the optimization objective,NSGA-Ⅱ algorithm is used to optimize the hard point coordinates and bushing stiffness.The optimization results show that the toe-in,camber,tread and wheelbase variation range and maximum value of the multi-link suspension are reduced to a certain extent in the process of the wheel running up and down in parallel.When the wheel is subjected to lateral force,longitudinal force and righting moment,the range of change of toe-in,camber,tread and wheelbase decreases.

关 键 词：多连杆悬架 K&C特性 硬点优化 衬套刚度优化 多目标优化 

分 类 号：U463.33[机械工程—车辆工程]