汽车动力总成隔振悬置布置的设计思想论析

作者系统总结和分析了汽车动力总成一悬置系统的设计思想。应用刚体的撞击中心理论布置动力总成的前、后悬置，同时兼顾动力总成和车身的垂向弹性弯曲振动模态的影响以及发动机往复不平衡惯性力的作用中心，可有效提高汽车的舒适性。V型布置的悬置组能解除动力总成、悬置系统横移、侧倾自由度之间的弹性耦合，既有较大的横向刚度，又有足够的侧倾柔度；既有利于获得动力总成的第一阶刚体模态为绕扭矩轴做侧倾振动的模态，也便于该系统刚体模态频率与汽车其它子系统固有频率之间的合理分配，从而获得良好的怠速隔振性能。

A Survey of Design Methods for Automotive Engine Mounting System

This paper is a survey of design methods for autmotive power plant mounting systems. Locating the front and rear mounts according to the impact center theory of rigid-body is an effective way for automobiles to achieve good ride performance. In addition, the position of the center of the engine's unbalanced reciprocal inertia force and, influences of the vertical bending vibration modes of automotive power plant and vehicle body should also be considered. The mounting system with V-formed arrangement can uncouple elastically the power plant modal motions in the transverse and roll directions, and it will have sufficient transverse stiffness and roll flexibility. So the power plant with the V-formed mounting system can obtain an uncoupled modal vibration round the torque axis of the power plant, and the rigid-body modal frequencies of the power plant can be well-matched with the natural vibration frequencies of other subsystems of automobile.