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以铁路客运列车直线运行时的轮轨接触问题为研究对象,在利用前期研究构建的薄层模型计算轮轨非赫兹接触正应力分布的基础上,分析了直线滚动时轮轨接触斑的蠕滑问题和切应力分布,进一步构建了精确求解任意形状接触斑正压力和切向力共同作用下轮轨内部各点应力的计算模型.结合算例,计算了不同类型轮轨接触斑内的滚动接触应力,并深入计算了钢轨内部各点的Mises应力和最大切应力,分析了滚动过程中接触斑上正压力和切向力对钢轨内部应力的影响规律.
Taking the wheel-rail contact problem in the straight line operation of railway passenger train as the research object, based on the thin layer model built in the previous research, the normal stress distribution of wheel and rail non-Hertzian contact is analyzed. Problem and shear stress distribution, the calculation model of each point inside wheel-rail under the combined action of positive pressure and tangential force of arbitrary contact patch is further established.Combined with the examples, the rolling contact Stress and the Mises stress and the maximum shear stress at each point inside the rail are calculated in depth. The influence of the positive pressure and the tangential force on the contact spot on the internal stress of the rail is analyzed.