关键词: 车辆工程, 电动汽车, 动力总成悬置系统, 声压级

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