本文应用子结构组合模态综合法,利用试验模态数据,在计算机上建立了一个包括汽车20Hz之前各阶弹性模态和刚体模态的整车动力学模型。为容纳尽可能多的模态数和测点数,提出了在模型计算过程中的分步计算法。 In this paper, a sub-structure combined modal synthesis method is used to establish a dynamic model of a complete vehicle including the elastic modes and the rigid body modes before 20 Hz of the automobile by using the experimental modal data. In order to accommodate as many modalities and measurement points as possible, a step-by-step calculation method in the model calculation is proposed.