轨道参数对轮轨滚动接触行为影响

计算了不同轨道参数下JM3磨耗型车轮踏面沿60kg/m钢轨轨道滚动接触时轮轨接触几何参数和蠕滑率的变化情况；然后根据确定的轮轨接触几何参数和蠕滑率，利用非Hertz滚动接触理论和数值程序CONTACT分析了不同轨底坡和轨距对轮轨接触斑行为的影响。数值结果表明：使用1/40轨底坡时轮轨滚动接触行为不能达到最佳匹配状态，建议对目前的轮轨型面进行重新优化设计；增加轨距对轮轨接触几何参数和蠕滑率产生较大影响，小半径曲线上在考虑运行安全情况下可适当增加轨距。

Effect of Track Parameters on Rolling Contact Behavior of Wheel-rail

The rolling contact geometrical parameters and creepages of JM3 wheelset and 60kg/m rail track in static rolling contact were analyzed under different track structural parameters. On the basis of the contact geometrical parameters and creepages of wheel-rail, the effects of track parameters wheel/rail contact patch behavior were investigated using the rolling contact theory of three-dimensional elastic bodies with non-Hertz form and numerical program of CONTACT. The numerical results indicate that the rolling contact behavior of wheel/rail is not achieving the optimal state when the rail base slope is 1/40. So, it is suggested that the profile of wheel/rail tread is optimized. The rail gauge has obvious effect on contact geometrical parameters and creepages of wheel/rail. Considering the operational safety of rolling stock, the rail gauge can be increased properly under small curve radius condition.