考虑传动系统扭转振动的单节列车动力学特性分析

Analysis of the Dynamics Characteristic of Single Section Train with Considering the Torsional Vibration of Transmission System

为对传动系统扭振特性给单节列车动力学性能造成的影响进行分析,把列车的传动系统简化为轴段与圆盘串联的系统,建立传动系统的扭振模型,同时计算由扭转振动产生的附加力矩。建立某高速列车的多体动力学模型,以附加力矩作为主要考虑指标,通过联合仿真,对比分析了考虑与不考虑动力传动系统扭振特性时单节列车在牵引工况下的动力学特性。结果表明,传动系统扭振对车身在横向、垂向上的振动加速度影响较大,在纵向上影响较小。但其给构架、轮对在纵向上会造成较大影响。因此,在对高速列车进行动力学分析时,考虑传动系统扭转振动特性,更符合列车的实际运行状态。

In order to analyze the influence of vibration of transmission system on vehicle dynamics performanee, the train drive system is simplified as a series system containing shaft segments and equivalent disc, a whole multi - body dynamics model of a high speed train and a torsional vibration model of transmission system are established, and the calculation and analysis of additional moment produced by torsional vibration is carried out. Regarding the additional moment as the main factor, through the united simulation, the dynamics characteristic of the high speed train under the traction conditions with and without the torsional vibration characteristic of the transmission system are compared and analyzed. The results show that, under traction condition, the torsional vibration of the transmission system has a large influence on the vibration acceleration of the vehicle body in the lateral and vertical direction, and less influence on the carbody longitudinal vibration. The additional torque has large influence on the longitudinal vibration of bogie frame and wheelset. Therefore, in the dynamics analysis of high speed train, taking the torsional vibration characteristics of the transmission system in consideration is more suitable to the real condition of the train operation.