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利用ANSYS有限元软件建立轮轨滑动摩擦热-结构耦合简化模型,针对特定载荷、摩擦因数和相对滑动速度工况进行了轮轨的温度场和应力场研究。结果表明:轮轨处在滑动摩擦状态时,需考虑材料参数随温度变化的影响;热影响区分布于轮轨表面很薄层,并在此薄层产生很高的热应力;随着轴重力、摩擦因数和相对滑动速度的增大,轮轨的热效应越明显。轮轨滑动过程的热效应问题研究将有助于揭示接触过程中的表面磨损机理。
The thermal-structural coupling simplified model of wheel-rail sliding friction is established by ANSYS finite element software. The temperature and stress fields of wheel-rail are studied for specific load, friction factor and relative sliding speed conditions. The results show that when the wheel and rail are in sliding friction state, the influence of temperature on the material parameters should be considered. The heat affected zone is distributed on the surface of the wheel and rail and is very thin. The thin layer produces high thermal stress. , The friction coefficient and the relative sliding speed increase, the more obvious the thermal effects of the wheel and rail. The study of the thermal effects of the wheel and rail sliding process will help to reveal the surface wear mechanism during the contact process.