基于AMESim的液压减振器异响分析与改进研究

Analysis of Abnormal Noise and Improvement for Hydraulic Damper Based on AMESim

在路面激励下,减振器活塞杆杆端的异常振动激发车体振动,引起结构传递噪声。而区别于无异响减振器,异响减振器的活塞杆杆端振动加速度在285 Hz左右出现一个明显的峰值。对此,建立减振器的AMESim模型,并将仿真结果与试验结果进行对比来检验模型的可信度。最后通过改变橡胶减振垫的阻尼和刚度来减小活塞杆杆端振动加速度在285 Hz左右的峰值,以达到控制减振器异响的目的。

Under the road excitation, the vibration of the piston rod end of shock absorber excites the vibration of body to generate the structure borne noise. There is a peak of the rod acceleration around 285Hz for the abnormal sound shock absorber, which is different from the normal sound. For this, the AMESim model of the shock absorber is established to change the peak of the rod acceleration around 285Hz through changing the damping and stiffness of the outer joins sets, in order to control the abnormal sound.