抗蛇行减振器动态特性研究

Research on Dynamic Performance of Yaw Damper

车辆在实际线路运行的过程中,减振器会表现出复杂的动态特性,新减振器与服役过一段时间的减振器表现出的动态特性会有所变化,减振器不同安装长度也会表现出不同的动态特性。主要针对新的抗蛇行减振器与服役一段时间后的减振器以及不同安装长度时的动态特性分别进行了研究。结果表明:减振器在服役一段时间后,动态刚度、动态阻尼均有所下降(小幅值时比较明显),随着幅值的增大,二者之间的变化越来越小;不同安装长度时,随着长度增加,动态刚度、动态阻尼均有所减小,而动态阻尼在低幅以及高幅低频时,随着长度的减小而增大现象比较明显,在高幅高频时,动态阻尼变化不是很明显。

Yaw damper would manifest complex dynamic performance when vehicles run. Different dynamic performance would happen between new yaw damper and old yaw damper. Different installation length would show various dynamic feature. The analysis on new damper and old damper and various installation length were discussed. It could be concluded that dynamic stiffness and dynamic damping were both reducing when damper served for a long time, which was more obvious when amplitude was small, and the difference between new damper and old damper would become smaller with the increasing of amplitude; The dynamic stiffness and dynamic damping would reduce with the increasing installation length; Dynamic damping would reduce with the augment of installation length with small amplitude or big amplitude and low frequency; There was no obvious changes between dynamic damping when amplitude and frequency were big enough.