高速列车传动系统动态特性分析

Analysis of Drivetrain Modeling and Dynamic for EMU

以国内现有高速车型为研究对象,综合考虑驱动系统齿轮传动刚度时变特性,实际列车牵引特性和基本阻力特性,通过建立高速列车三维动车动力学模型开展高速列车传动系统与车辆动力学相互作用的研究。齿轮啮合刚度时变特性使得齿轮传动内部产生激励,在刚度激励和啮入冲击激励作用下轮对垂向振动响应较大,但不影响轮对其它运动形态;由于轮轨接触的负斜率特性,仿真分析了轮对出现失稳振动后传动系统的响应,发现相对轮对旋转振动而言轮对纵向振动对列车驱动系统的影响更大,但这两种振动形态往往通过轮轨切向力耦合在一起。

With the domestic existing EMU as the research object, considering the gear stiffness time characteristics, actual traction and basic resistance characteristic comprehensively, a 3D dynamic model of drive train was modeled to study the interaction regulation between vehicle dynamics and drivetrain. Gear system existing internal excitation due to the time characteristics of contact stiffness, wheelset vertical vibration response was more violent than other under stiffness excitation and shock excitatiorL Because the wheel rail contact exist negative slope characteristics, the response of drivetrain under the case of unstably wheelset vibration was simulated. Results＇ show that the influence on drivetrain of longitudinal vibration is more severe than rotary vibration, and both of them are coupled with the wheel rail tangential force.