轴箱布置方式对地铁直线电机车辆动力学性能的影响

基于车辆系统动力学理论,建立了两种不同轴箱布置方式的地铁车辆动力学模型,在实际线路条件下,分析对比了轴箱内置与外置两种转向架,因为簧下质量以及悬挂系统横向跨距变化而造成轮轨接触以及车辆平稳性改变。研究结果表明,两种轴箱布置方式对车体平稳性影响较小;但轴箱内置车辆为达到理想的稳定性,需要加大一系径向刚度并加装抗蛇行减振器;轴箱内置能够降低轮对摇头角刚度,提高车辆适应线路扭曲不平顺的能力,同时降低轮对踏面磨耗功率,改善小半径曲线上轮轨磨耗。

Influence of Axle Box Arrangement on the Dynamic Performance of Linear Motor Metro

Based on vehicle system dynamics theory,two bogies with different axle box layout methods are established.Since the changes of unsprung mass and lateral span of suspension will influence wheel/rail contact and vehicle stability,the dynamic characteristics of the bogie with inside axle box and the bogie with external axle box are compared according to the actual line conditions.The study shows that the two axle box layout methods have little influence on ride index,but for an ideal vehicle stability,it is necessary to increase the primary horizontal stiffness and add the anti-snake movement damper.Using the inside axle box layout can improve the vehicle adaptability to the guide-way irregularity and reduce the wheel tread wear power,improve the wheel/rail wear while passing small radius curve at the same time.