齿轮箱吊杆节点刚度对轴箱内置式高速列车驱动系统动态特性影响研究

为探明齿轮箱吊杆节点刚度对驱动系统悬挂节点力和驱动系统振动加速度的影响规律，以某型轴箱内置式高速动车为研究对象，基于多体动力学理论，建立了考虑驱动系统和齿轮啮合的车辆系统动力学模型，研究了齿轮箱吊杆节点刚度对齿轮箱吊杆节点力、电机吊点力、齿轮箱车轴铰接力、车辆平稳性和驱动系统振动加速度的影响.研究结果表明：由于1、2位驱动系统的齿轮啮合力方向不同，1位驱动系统悬挂节点的垂向力比2位驱动系统悬挂节点的垂向力大.齿轮箱吊杆节点刚度在1～30 MN/m增大时，1位齿轮箱吊杆节点力增大，1位电机吊点力减小，1位齿轮箱车轴铰接纵向力增大、横向力减小；2位齿轮箱吊杆节点力增大，2位电机吊点垂向力增大，纵向力和横向力减小，2位齿轮箱车轴铰接纵向力减小，横向力增大.齿轮箱吊杆节点刚度在30～100MN/m增大时，各悬挂节点力变化不明显.此外，车体的平稳性指标、电机和齿轮箱的振动加速度受齿轮箱吊杆节点刚度变化的影响较小.

Effect of the suspension stiffness of the gearbox rod on the dynamic characteristics of the drive system of high speed train with the built in axle box

To reveal the law of the gearbox rod suspension stiffness on the suspension force and vibration acceleration of the drive system, a certain type of high-speed train with the built-in axle box is taken as the study object, and a vehicle dynamics model considering drive system and gear engagement is established based on the multi-body dynamics theory. In addition, the effect of the suspension stiffness of the gearbox rod on the suspension force of the gearbox rod and the motor, the joint force between the gearbox and the axle, the vehicle stability and the vibration acceleration of the drive system are studied. The research results show that due to the different direction of the gear meshing force of the first drive system and the second drive system, the vertical suspension force of the first drive system is larger than that of the second drive system. When the suspension stiffness of the gearbox rod increases from 1 MN/m to 30 MN/m, the suspension force of the first gearbox and the first motor increases and decreases respectively, as well as the longitudinal force and the lateral force of the first connection point for gearbox and axle increases and decreases respectively. Moreover, the suspension force of the second gearbox and the vertical suspension force of the second motor increase, but the longitudinal suspension force and the lateral suspension force of the second motor decrease, and the longitudinal force of the second connection point for gearbox and axle decreases and increases respectively. However, the change in the suspension force is not obvious when the suspension stiffness of the gearbox rod increases from 30 MN/m to 100 MN/m. Furthermore, the stability index of the car body, as well as the vibration acceleration of the motor and the gearbox are little affected by the changing suspension stiffness of the gearbox rod.