According to the researches on the formation mechanism of wheel rail creep, it is found that the rolling radius difference of wheel rail contact is an important parameter affecting wheel rail creep. By using vehicle dynamics software NUCARS and selecting different rail profiles as well, simulation was carried out on the effects of the rolling radius difference on wheel-rail interaction. Based on this, it is proposed that wheel rail creep should be eliminated or reduced by rail grinding. Accordingly, the wheel rail interaction can be improved and the service life of rail can be prolonged. Theoretical calculation and on-site rail grinding tests show that after the application of rail grinding to Da-Qin heavy haul railway, the rolling radius difference has been reduced. The joint contact between the rail profile and wheel has reduced wheel-rail creep force, lateral force and rolling resistance. The steering characteristics of the bogie have been improved. The average side wear of rail has been reduced almost 50%. The carrying gross weight of rail has been increased from 9×108 t to 15 ×108 t above.%根据对轮轨蠕滑形成机理的研究,指出轮轨接触的滚动半径差是影响轮轨蠕滑的重要参数；利用车辆动力学软件NUCARS和选用不同钢轨廓形,仿真计算滚动半径差对轮轨关系的影响,据此提出应通过钢轨打磨,消除或减弱轮轨蠕滑,从而实现轮轨关系的改善,达到延长钢轨使用寿命的目的.理论计算和现场钢轨打磨试验表明,在大秦重载铁路实施钢轨打磨后,滚动半径差减小,钢轨的廓面形状与车轮形成贴合型接触,降低了轮轨蠕滑力和横向力以及轮轨滚动阻力,改善了轮轴转向特性,使钢轨的平均侧磨减少了将近50％,钢轨的通过总重从9×108 t增加到15×108 t以上.
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