建立了磁流体耦合轮对转向架车辆的动力学计算模型 ,利用数值模拟方法对比较恶劣的小半径曲线通过工况进行了动态仿真计算 ,找出了磁流体耦合轮对转向架前后轮对的耦合度对曲线通过性能的影响规律。通过对传统固定轮对转向架、独立车轮转向架、磁流体耦合轮对转向架曲线通过性能的比较 ,发现耦合轮对可以有效改善转向架的小半径曲线通过性能 The dynamic model of the bogie truck with magnetic fluid coupling wheel was established. The numerical simulation method was used to simulate the bad small radius curve through the working conditions, and the relationship between the magnetic fluid coupling wheel and the front and rear wheelsets The influence of coupling degree on the curve passing performance. Through comparing the curve passing performance of the traditional fixed wheelset, independent wheel bogie, magnetic fluid coupling wheelset and bogie, it is found that the coupling wheelset can effectively improve the performance of small radius curve passing performance of the bogie