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针对200 km/h八轴交流传动机车设计方案中低速运行时轮对横向出现一定幅度的极限环振动,线性临界速度偏低的问题,着重分析了机车一系纵向刚度、抗蛇行减振器的阻尼系数和抗蛇行减振器的安装刚度这3个关键参数对机车横向稳定性的影响。分析结果表明,机车在低速下运行时轮对横向振动的极限环振幅随着一系纵向刚度、抗蛇行减振器的安装刚度和抗蛇行减振器的阻尼系数的增大会有所增大,临界速度会随着一系纵向刚度和抗蛇行减振器安装刚度的增大而略微减小,随着抗蛇行减振器的阻尼系数的增大而增大。通过对3个参数进行合理匹配可以使机车取得良好的横向稳定性。
Aiming at the problem that the limit cycle vibration and the linear critical speed of the 200 km / h eight-axis AC drive locomotive at a low speed occur at a low speed in a transverse direction, the longitudinal stiffness of the locomotive, the anti-snake shock absorber Damping coefficient and anti-snake shock absorber installation rigidity of the three key parameters of the locomotive lateral stability. The analysis results show that the limit ring amplitude of the lateral vibration of the wheelset when the locomotive operates at low speed will increase with the increase of a series of longitudinal stiffness, the installation stiffness of the anti-snake shock absorber and the damping coefficient of anti-snake shock absorber, The critical speed decreases slightly with the increase of longitudinal stiffness and anti-snaking shock absorber mounting stiffness, and increases with the damping coefficient of anti-snake shock absorber. By reasonably matching the three parameters, the locomotive can achieve good lateral stability.