高速机车万向传动系统动态曲线通过时的动力特性研究

Dynamic Study of the Universal Transmission Shaft of High Speed Bogie Passing through the Dynamic Curved Track

为了研究转向架传动系统高速通过动态曲线时的动力特性，本文以万向传动轴为对象，利用 Ｒ Ｗ 方法建立了系统的力学模型和动力学微分方程。选取 ３６ 种通过动态曲线的典型工况，进行数值仿真。结果表明，万向轴传动比主要受机车运行速度和线路不平顺幅值的影响，而万向轴转速除了受这两个因素的影响外，还与不平顺波长和构件摩擦有关。另外适当增大曲线半径和超高可以改善万向轴传动特性。万向轴动力学分析的结果对电机控制系统、机车运行稳定性以及万向轴的结构设计和线路设计都有很重要的意义。

In order to study the dynamic characteristics of the locomotive driving system at high speed, in this paper,taking example of the universal transmission shaft,dynamic model is made and differential equtions are formulated by means of Roberson Witternberg method. Numerical simulation is done according to 36 typical kinds of vehicle negotiation.The results show that the transmission characteristics of the universal transmission shaft are affected by running velocity and the range of exoteric irregularities,and the fluctuation of the ratate speed of the shaft is not only determined by the former two factors, but also by the friction between the parts.Besides, the transmission characteristics will be improved by properly increasing the curve radius and the height difference.The conclusions provide valuable information for further study on stability of locomotive and control of the driver and structural design of the shaft.