基于Adams/Insight的麦弗逊前悬架振动分析及优化设计

摘要

以某款紧凑型轿车的麦弗逊前悬架为研究对象,在Adams/Car模块中建立悬架系统动力学模型,进行仿真试验,并根据仿真结果分析车轮跳动时各项参数的变化规律.针对分析中存在的主销外倾角和主销内倾角变化范围较大的问题,使用Adams/Insight模块对该悬架的部分硬点位置进行优化设计.优化结果表明:调整下控制臂、转向横拉杆和滑柱的部分硬点坐标,可以减小各项参数在车轮跳动中振动幅度,改善车辆的行驶稳定性.%Macpherson front suspension of a certain type of compact vehicle is studied. A dynamics model of the suspension system is established by using Adams/Car module. The kinematics simulation of the suspension is carried out. The variation rule of each parameter related to wheel jumpiness is analyzed according to the simulation result. To solve the problem of the excessive changes of the caster angle and the kingpin inclination angle in the analysis, Adams/Insight module is applied to optimize the locations of some hard points of the suspension. Results of the optimization show that the vibration magnitudes of the parameter related to the wheel jumpiness can be reduced by adjusting the coordinates of the hard points of the lower control arm, steering tie rod and the strut to improve the performance of driving stability.