Abstract: With the improvement of the running speed level of metro vehicles， due to the limitation of installation spaces and costs， the fast metro without yew dampers would have the problems of insufficient vehicle running stability. In view of this problem， a connected secondary transverse damper was proposed， which might provide the functions of transverse damper， and achieve the purpose of anti-hunting damping. Based on the working principles of the connected transverse damper， the mathematical model of the connected transverse damper and a more accurate AMESim simulation model were established， and the damping characteristics of the connected transverse damper under different vehicle motion states were analyzed. Finally， MATLAB/Simulink was used to co-simulate the connected transverse damper model and the subway vehicle dynamic model. The influences of the connected transverse dampers on the dynamics performance of the vehicle system were further studied. The simulation results show that the connected transverse damper may greatly improve the nonlinear critical speed of the vehicles and improve the operation stability of the subway vehicles under the conditions of ensuring the stability of the vehicle running in a straight line and the safety of passing through a curve.

Key words:  , metro vehicle, connected transverse damper, hunting stability, vehicle dynamics performance

摘要： 随着地铁车辆运行速度等级的提高，受安装空间与成本限制，未安装抗蛇行减振器的快速地铁将出现车辆运行稳定性不足的问题，针对这一问题，提出一种连通式二系横向减振器，该减振器既能够提供横向减振的功能，又能达到抗蛇行减振的目的。基于连通式横向减振器的工作原理，建立了连通式横向减振器的数学模型以及更为准确的AMESim仿真模型，并分析了不同车辆运动状态下连通式横向减振器的阻尼特征。最后采用MATLAB/Simulink对连通式横向减振器模型与地铁车辆动力学模型进行联合仿真，研究了连通式横向减振器对车辆系统动力学性能的影响。仿真结果表明，连通式横向减振器在保证车辆直线运行平稳性及曲线通过安全性的条件下，大幅提高了车辆非线性临界速度，改善了地铁车辆的运行稳定性。

关键词: 地铁车辆, 连通式横向减振器, 蛇行稳定性, 车辆动力学行为