车轮型面对轮轨黏滑特性影响

Effect of Wheel Profile on Stick-slip Characteristic of Wheel-rail

摘要:

利用非Hertz滚动接触理论和数值程序CONTACT分析了LM，LMA，S1002和XP55四种车轮型面与我国CHN60钢轨匹配时的轮轨黏滑特性。数值结果表明：四种车轮型面与CHN60钢轨匹配时的轮轨接触斑黏滑特性明显不同，车轮型面对轮轨接触斑面积、黏滑区分布、轮轨摩擦功等有较大影响；LM型面与CHN60匹配时的蠕滑区面积和轮轨摩擦功较大，且接触斑更容易达到饱和状态；LMA型面与CHN60匹配时的黏滑特性较佳，其接触斑面积、黏着区面积较大；S1002型面与CHN60匹配时的黏滑特性较XP55型面要好。

Abstract:

The stick-slip behaviors of wheel-rail between LM, LMA, S1002, XP55 wheel profiles and CHN60 rail in static rolling contact were analyzed 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 stick-slip characteristics of wheel-rail between LM, LMA, S1002, XP55 wheel profiles and CHN60 rail are different. The wheel profile has obvious effect on area of contact zone, stick-slip distributing amd friction work wheel-rail. The stick-slip characteristic between LMA wheel profile and CHN60 rail is better and the areas of contact zone and stick zone are larger. The stick-slip behaviors between S1002 wheel profile and CHN60 rail is better than that of XP55 wheel profile.