五模块中低速磁浮车辆系统动力学仿真研究

Study of Five-Module-HSST Maglev Vehicle Dynamics

在对五模块中低速磁悬浮车辆进行结构分析和运动分析的基础上,利用SIMPACK软件建立了90个自由度的整车动力学模型,并对磁悬浮车辆进行了动力学性能仿真。仿真结果表明:中低速磁浮车辆车体的垂向运行平稳性主要受二系垂向阻尼影响,而横向运行平稳性主要受滑台滑块之间的摩擦系数影响,受该磁悬浮车辆悬挂结构的制约,该磁浮车的最大运行速度不能超过90 km/h;通过曲线时,车体的最大横移量、侧滚角与各悬浮侧架的最大横移量、侧滚角、摇头角都随着通过速度的增大而增大,其中,1,2位与4,5位悬浮架的曲线性能基本对称。悬浮侧架与轨道间的最小横向间隙随着速度增大而减小,当速度为80 km/h时,悬浮侧架上的导向轮与轨道已接触,所以该磁浮车通过半径为300 m的曲线时速度应限制在80 km/h以下,最好不超过70 km/h。

On the basis of structure analysis of five modules middle-low speed magnetic Levitation vehicle,90- freedom-dynamics model of the whole vehicle is established by the use of software SIMPACK,moreover,dynamics performance analysis is done. The simulation results show car-body＇ s vertical comfort index is related to vertical damping of secondary suspension while car-body＇ s lat- eral comfort index is related to friction stiffness between slipper and slipway. For the restriction of secondary suspension,the maximum velocity must be lower than 90 km/h;When the Vehicle running on curve, maximum lateral displacement and roll angle of car body and maximum lateral displacement 、 roll angle and yaw angle of suspension side frame increase with the increasing velocity, besides, curve performances of the first and the fifth suspension frames are symmetric as well as the second and the fourth suspension frames. The lateral gap between side frame and track decrease with the increasing velocity, when the velocity arrives at 80 km/h,the guide-wheels of side frames will contact with track. So,the velocity of the vehicle must be lower than 80 km/h,70 km/h as possible, when it running on a line which curve radius is 300 m.