本文应用等效线性化法,来讨论等速行驶的车辆,受到随机不平路面激励的弱非线性振动。并举例用两种方法进行计算,以便对悬挂系统作为Duffing振子和作为相应的线性振子,在相同的工作条件下位移z均方响应估计作一比较。通过讨论得出结论,认为用等效线性化方法处理弱非线性问题是较方便的。 In this paper, equivalent linearization method is used to discuss the vehicle with constant speed and weak nonlinear vibration excited by random uneven road. The two methods are used as examples in order to compare the suspension system as a Duffing oscillator and the corresponding linear oscillator under the same operating conditions. Through the discussion, we conclude that it is more convenient to deal with the weak nonlinear problem by using the equivalent linearization method.