整车刚柔耦合动力学模型及平顺性优化

为了研究车身的弹性变形对整车行驶平顺性的影响,在ADAMS/Car模块中建立整车刚柔耦合模型,依据相关试验法规,进行了随机路面输入下的平顺性仿真试验,并通过实车道路试验对比验证模型的正确性和合理性.利用验证后的整车刚柔耦合模型和试验设计技术,对悬架的弹簧刚度系数、减震器阻尼系数进行优化.优化后车身质心处垂向振动加权加速度均方根值降低了12.6％,表明悬架系统参数的合理匹配可以明显改善车辆的行驶平顺性.

Vehicle Rigid-Flexible Coupling Dynamics Model and Ride Comfort Optimization

In order to investigate the influence of elastic deformation of the vehicle body on its ride comfort,a rigid-flexible coupling model of the vehicle in ADAMS/Car module was established.Then a simulation test was conducted according to the relevant test regulations to evaluate its ride comfort under random road input,and an actual vehicle road test was made to verify the accuracy and rationality of the model.The verified rigid-flexible coupling model and the design technique of the experiment were used to optimize the spring stiffness coefficient of the suspension and the damping coefficient of the shock absorber.The weighted acceleration root mean square value of vertical vibration at center of mass of the vehicle body decreased by 12.6% after optimization,indicating that a reasonable match of suspension system parameters can significantly improve the vehicle ride comfort.