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改进了车轮型面设计方法,给出了设计方法的解析数学表达式,将轮对等效锥度与轮轨型面接触状态联系起来,对设计实例进行了轮轨几何接触、非赫兹滚动接触和车辆动力学性能分析。研究结果表明:轮轨接触点能够均匀分散分布;由于接触斑面积增大约23%,最大接触压力降低约21%,使轮轨滚动接触应力降低了约20%;装备实例型面的车辆临界速度与LMA型面几乎相同,由于轮对等效锥度略有提高使其曲线通过性能略好于后者。可见,该方法可以改善轮轨接触状态,有利于轮轨型面均匀磨耗及缓解轮轨滚动接触疲劳。
The design method of the wheel profile is improved and the analytical expression of the design method is given. The equivalent conicity of the wheelset is related to the contact state of the wheel-rail profile. The wheel-rail geometric contact, non-Hertzian rolling contact and Vehicle dynamics analysis. The results show that the wheel-rail contact points can be uniformly distributed; the contact stress is reduced by about 20% due to the increase of the contact area by about 23% and the maximum contact pressure of about 21%; the vehicle critical speed Almost the same as the LMA profile, the curve pass performance is slightly better than the latter due to a slight increase in the equivalent cone of the wheelset. It can be seen that this method can improve the wheel-rail contact state, contribute to the uniform wear on the wheel-rail surface and ease the wheel-rail rolling contact fatigue.