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轮轨之间的相对滑动所产生的摩擦热是引起轮轨摩擦损伤的主要因素。环境温度作为轮轨滑动接触中客观存在的自然现象,其大小决定了轮轨与空气间的热量传递以及轮轨表面温度,大部分科研在轮轨滑动接触分析中将环境温度取为20C°。借助ABAQUS有限元软件,对轮轨滑动状态进行三维热弹塑性分析,针对不同的环境温度,在指定滑动速度下,分析轮轨接触区的温度场变化。结果表明:环境温度的增加并未引起轮轨接触区温度场的巨大变化,环境温度数值的大小变化对轮轨滑动摩擦的接触影响较小,在轮轨的数值模拟计算中可以将环境温度取一个定值。
The frictional heat generated by the relative sliding between wheel and rail is the main factor that causes the wheel and rail friction damage. As a natural objective phenomenon of wheel / rail sliding contact, the ambient temperature determines the heat transfer between the wheel rail and the air and the temperature of the wheel / rail surface. Most of the research takes the ambient temperature as 20 ° C in the wheel / rail sliding contact analysis. With the aid of ABAQUS finite element software, the three-dimensional thermo-plastic analysis of the wheel-rail slip state is carried out. The temperature field of the wheel-rail contact zone is analyzed under different ambient temperatures at the specified slip speed. The results show that the increase of ambient temperature does not cause a great change of the temperature field in the wheel-rail contact zone. The change of the ambient temperature has little effect on the contact of the wheel-rail sliding friction. In the numerical simulation of wheel-rail, A fixed value.