综合传动装置悬置系统刚度灵敏度分析与振动能量解耦

基于综合传动装置悬置系统6自由度耦合振动模型，利用灵敏度分析方法，计算悬置系统各阶固有振动频率关于各悬置各方向刚度的灵敏度，确定影响某一方向振动的关键橡胶刚度，为改善系统某一方向的振动提供理论依据.以系统各方向振动解耦率作为目标函数，综合考虑传动轴激励、人体承受振动敏感区域及各向振动耦合状况来确定优化约束条件，进行刚度参数最优化，得到的悬置系统各方向最优刚度值可用于改善悬置系统隔振性能.针对某一传动系统振动恶化的情况，采用刚度灵敏度分析与振动能量解耦综合方法，对悬置系统进行设计.最后利用台架振动试验结果验证悬置系统优化设计的有效性. 

Stiffness Sensitivity Analysis and Vibration Energy Decoupling of Powertrain Mounting System

Based on the 6 degrees of freedom(DOFs) vibration coupling model of the powertrain mounting system, the sensitivity analysis method was used to calculate the sensitivity of each natural frequency to the mounting stiffness in each direction. It is to identify the key rubber stiffness that affects the vibration in a certain direction, and to provide a theoretical guide for the improvement of the vibration characteristics in a certain direction. Then, taking the decoupling rate of each direction as the objective function, considering the drive shaft excitation, the sensitive vibration frequency region of the human body and the each direction vibration coupling conditions for the optimal constraint condition determination, a optimization algorithm was used to extract the optimal stiffness value of each direction and to improve vibration isolation performance of the mounting system. Aiming at the vibration deterioration of a certain powertrain system, a mounting system was designed by means of the sensitivity analysis method and vibration energy decoupling method. Finally, a vibration bench test was applied on the mounting system to verify the availability of the optimization design.