为了研究通过控制空簧(空气弹簧)升降来使车体倾摆的摆式列车控制策略和动力学性能,建立考虑空簧悬挂系统的摆式列车多刚体动力学仿真模型。模型中考虑了高度控制阀、差压阀、倾摆控制策略以及车辆系统中的非线性特性,由理想气体状态方程建立了左右侧耦合的空簧系统垂向力学模型。采用数值仿真方法研究了摆式列车在曲线轨道上运行时的倾摆策略和动力学性能。仿真结果表明:通过控制左右侧空簧的升降可以使车体按要求倾摆,减小车辆通过曲线时作用在旅客身上的未平衡横向加速度,改善曲线通过平稳性,从而提高摆式列车曲线通过速度10%左右;车辆通过曲线后可以用高度阀调整车体回复到平衡位置附近;增加空气弹簧距轨面高度可以改善倾摆效果。
In order to study the control strategy and dynamic behaviour of tilting trains by using the car body tilting method of controlling the vertical displacement of air springs, the dynamic model of the tilting train with consideration of the air spring suspension system is set up. The leveling valves, pressure differential valve, tilting control strategy and the nonlinearities in the vehicle systems are included in the model. The vertical mechanical model coupled with left and right air spring systems are established by considering the ideal gas state equations. The tilting control strategy and dynamic behaviour of the tilting train running on curved track are investigated by numerical simulation method. The simulation results indicate that the car body can tilt to a required angle by controlling the left and right air spring vertical displacements. Then the unbalanced lateral acceleration acted on the passengers can be reduced to improve the ride comfort, and the train speed can raise about 10% compared with the non-tilting train. The car body can restore to its equilibrium position by adjusting the leveling valve after curve exit. The titling performance can be improved by increasing the height of air spring to rail top.