CRH2动车组车辆间减振器的最佳布置位置及动力学行为研究

Research on Best Layout and Dynamic Behavior of Inter-vehicle Damper in CRH2 EMU

以CRH2的动力学参数为基础,基于多体动力学软件Universal Mechanism建立了6动2拖8辆编组的动车组列车系统动力学模型。从列车的稳定性、平稳性和曲线通过性能3个方面考量,将无纵向减振器与有纵向减振器的两列动车组进行对比分析,研究表明,车辆间加装纵向减振器由于加强了车辆间的耦合作用,可提高列车的蛇行稳定性及非线性临界速度,但是,过大的阻尼和节点定位刚度会降低列车的曲线通过性能,增加轮轨磨耗;通过研究车辆间纵向减振器的不同安装位置对列车动力学性能的影响,确定了其最佳安装位置为车体底架端部左右两侧,与车钩中心线等高,横向跨距3.2 m处。

Based on the kinetic parameters of CRH2,based on the multi-body dynamics software Universal Mechanism,the dynamic model of the train system of the EMU train with six motor car and two trail car is established.From the three aspects of the stability,stability and curve performance of the train,through the comparison of the two EMU with no longitudinal shock absorber and the vertical shock absorber between the carbody,the research shows that the longitudinal shock absorber of the installation is added.Due to the enhanced coupling between vehicles,the serpentine stability of the train can be improved and the nonlinear critical speed of the train can be improved.However,excessive damping and node positioning stiffness will reduce the curve passing performance of the train and increase the wheel-rail wear;Studying the influence of different installation positions of longitudinal shock absorbers on the dynamic performance of the train,the optimal installation position of the vertical shock absorber is the left and right sides of the end of the chassis of the car body,and the height of the center line of the coupler,the transverse span 3.2m away.