中文摘要：

通过对轮轨载荷和运行参数的三维膜厚状态图的分析，发现水介质表现出弹性等黏度特性。为此，应用Grubin简化弹性流体动力润滑模型，结合Greenwood—Tripp微观固体接触理论，建立水介质存在时的高速轮轨黏着特性的三维简化数值模型。分析表明，该模型能很好地反映轮轨黏着情况，且求解时不需对雷诺方程反复迭代求解，计算过程简单。研究速度、粗糙度、接触压力以及边界摩擦因数对黏着系数的影响。结果表明，相比于其他因素，速度和粗糙度对黏着系数影响较大，随着速度的增加，黏着系数减小，随着粗糙度的增加，黏着系数先增大后达到一稳定值。

英文摘要：

Through the analysis of three-dimensional（3D） thickness conditions diagram of the wheel/rail load and parameter of running,it is found that water medium has elastic-isoviscosity characteristic.Therefore, combining the Grubin＇ s simplify elastic hydrodynamic lubrication model with Greenwood-Tripp＇ s micro-solid contact theory, the simplified 3D numerical model of high speed wheel/rail under water medium conditions was set up.The analysis indicates that the model can well reflect the wheel/rail adhesion conditions, and the calculation process of the model is simplified for the solution of the Reynolds equation iteratively can be avoided.The effects of speed, roughness, contact pressure and boundary friction coefficient on adhesion coefficient were studied.The results indicate that the speed and roughness have a greater effect on adhesion coefficient compared with other factors.Along with the increase of speed, the adhesion coefficient is decreased and with the increase of roughness, the adhesion coefficient is increased firstly, and then reaches a certain stable value.