Abstract: The power train mount system of electric vehicle with six degrees of freedom mathematical model and ADAMS simulation model were established. By analyzing the mode and vibration response of the mount system, the characteristics of mount system vibration was researched. Firstly, that the dynamic reaction force at the supporting of power train mount reached the minimum value was chosen as the optimal objective; secondly, the axial static stiffness of each mount was chosen as design variables; thirdly, the reasonable distribution of power train inherent frequency, mount and power train displacement were chosen as constraint conditions; finally, the optimization on mount parameters were conducted with ADAMS/Insight. The results show that the driver’s average sound pressure level at ear point is significantly reduced by 13%, and it was even reduced by 21% on the higher sound pressure level. The optimization well achieves the purpose of the noise reduction of vibration isolation.

Key words: vehicle engineering, electric vehicle, power train mount system, sound pressure level

摘要： 建立了某电动汽车动力总成悬置系统六自由度数学模型和ADAMS仿真模型，对系统进行了模态分析和振动响应分析,研究了系统的振动特性。选择动力总成悬置支承处动反力最小为优化 目标，各个悬置的轴向静刚度为设计变量，动力总成固有频率合理分布以及各个悬置和总成位移等为约束条件，利用 ADAMS/Insight 对悬置参数进行优化。结果表明优化悬置刚度参数后，驾 驶员耳旁测点平均声压级有明显的降低，降低了13%，特别是在声压值较高点降低尤其明显，降低了21%，很好地达到了隔振降噪的目的。

关键词: 车辆工程, 电动汽车, 动力总成悬置系统, 声压级