本文利用统计线性化方法对汽车车轮——悬架两自由度非线性系统进行线性化处理,对系统的响应预测进行了探讨,给出了两自由度非线性系统响应预测的公式。文中利用推导的公式分别计算了装少片板簧和多片板簧的解放牌CA141型汽车上一些感兴趣测点的响应,其结果与在MTS道路模拟机上实测的数据基本吻合。另外,还对减振器阻尼系数优化问题作了探讨,得出了以稳定性为目标优化减振器为最佳的结论。 In this paper, the statistical linearization method is used to linearize the wheel-suspension two-degree-of-freedom nonlinear system, the response prediction of the system is discussed, and the formula of two-degree-of-freedom nonlinear system response prediction is given. In this paper, the response of some interested measuring points on Jiefang CA141 with less leaf spring and multi-leaf spring is calculated respectively by the derivation formulas. The result is in good agreement with the measured data on MTS road simulator. In addition, the optimization of damping coefficient of shock absorber is also discussed. The conclusion that the shock absorber is optimized is the best.