为了保证某矿用窄轨机车的行车安全,对其车轴强度进行了分析。参照标准EN13104中的材料力学计算方法,选取该窄轨车轴的12个截面,计算出各车轴截面的应力、抗弯模量、弯矩以及安全系数。然后,根据力矩计算式用MATLAB程序绘制了车轴轴身力矩图,并用有限元分析方法进行了对比验证。结果表明,车轴危险截面位于轮座与轴身的凹槽过渡处,且最大截面应力小于许用应力,满足车轴强度设计要求。 In order to ensure the safety of a mine narrow-gauge locomotive, the axle strength was analyzed. With reference to the material mechanics calculation method in EN13104, 12 sections of the narrow axle axle were selected to calculate the stress, flexural modulus, bending moment and safety factor of each axle section. Then, according to the torque calculation formula, the axle shaft moment diagram of the axle is drawn by MATLAB program, and the comparison is verified by the finite element analysis method. The results show that the dangerous cross-section of the axle is located at the transition of the groove between the wheel seat and the axle body, and the maximum cross-section stress is less than the allowable stress to meet the design requirements of axle strength.