根据我国新建高速铁路列车轮轴几何尺寸,建立了轮轴过盈配合三维有限元模型,计算了列车在高速运行情况下的轮轴连接性能。计算分析了不同速度下的轮轴接触压力,配合面处等效应力等,并比较了最大与最小过盈量下轮轴的配合性能。结果表明,车轮的旋转速度对轮轴的接触压力有较大影响,合理的过盈量设置既可以保证静止状态下轮轴材料不出现塑性变形,又能使列车高速行驶时有足够的接触压力传递有效转矩。 According to the geometrical dimensions of the railway axles of the new high-speed railway in our country, a three-dimensional finite element model of axle interference fit is established and the axle connection performance of the train under high speed is calculated. The axle contact pressure at different speeds and the equivalent stress at the mating surface were calculated and analyzed, and the fitting performance of the axle under the maximum and minimum interference was compared. The results show that the rotational speed of the wheel has a great influence on the contact pressure of the axle, and the reasonable interference setting can not only prevent the plastic deformation of the axle under static state, but also ensure the effective contact pressure transmission when the train runs at high speed Torque.