本文把最近发展的柔性多体系统动力学应用到内燃机配气机构的动力计算之中,由此建立的配气机构多体模型优于以往其它各动力模型.多体模型不仅可以象有限元模型那样反映机构中各零件的真实形状,而且可以精确地处理各零件之间的连接副及约束状况,还可以解决机构中的脱离和冲击碰撞问题,使模拟计算更符合实际.计算与实测结果对比吻合良好. In this paper, the recent development of flexible multibody system dynamics is applied to the dynamic calculation of internal combustion engine valve train, and the multibody model of the valve train is superior to other previous dynamic models.Multibody model can not only be used as the finite element model That reflects the true shape of each part in the organization, and can accurately handle the connection between the various parts and constraints, but also can solve the problem of the mechanism of the separation and impact collisions, so that the simulation is more realistic. Comparisons with the measured results Good fit.