两种型面轮轨滚动接触蠕滑率和摩擦功

采用数值分析方法详细分析了2种型面轮对与轨道在滚动接触过程中的接触几何、蠕滑率和摩擦功。在摩擦功分析计算中利用了Kalker三维弹性体非赫兹滚动接触理论，并考虑了轮轨的结构变形的影响。分析计算表明，在轮对运动相同的情况下，磨耗型轮对与轨道之间的蠕滑率和摩擦功与锥型轮对轨道之间的蠕滑率和摩擦功相差甚大。数值分析结果表明，现行铁路中正在推广使用的磨耗型轮对并不能减少轮轨接触表面之间的磨损，磨损型车轮的型面与钢轨尺寸的匹配还有待进一步改进。

Creepages and Friction Work of Wheelset and Track with Two Type Profiles in Rolling Contact

The contact geometry, creepages and friction work of wheelset/track with two type profiles in rolling contact are investigated with numerical methods. In the analysis of the friction work, Kalker theory of three dimensional elastic bodies in rolling contact with non Hertzian form is employed and the effects of structure elastic deformations of wheelset/track on the friction work are also taken into consideration. According to the numerical results, the creepages and friction work of the wheelset with worn profile and track are greatly different from those of the wheelset with cone profile and track in the same situation of motion. It has also been found that the currently widely used wheelset with worn profile in the railway field of China cannot effectively reduce the wear of the contact surfaces of wheelset and track. Thus further work is urgently needed to realize optimal matching of the profiles of wheel/rail systems.