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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 bogie drive system passing through dynamic curve at high speed, the paper takes the universal shaft as the object, and establishes the mechanical model and dynamic differential equation by R-W method. Thirty-six kinds of typical conditions through the dynamic curve were selected for numerical simulation. The results show that the transmission ratio of the universal joint shaft is mainly affected by the operating speed of the locomotive and the amplitude of the line irregularity. Besides the influence of these two factors, the rotational speed of the universal joint shaft is also related to the uneven wavelength and the component friction. In addition, properly increasing the curve radius and ultra-high can improve the universal shaft transmission characteristics. The results of the dynamic analysis of the universal joint shaft have important meanings to the motor control system, the running stability of the locomotive and the structural design and circuit design of the universal joint shaft.