不同环境温度下轮轨滑动摩擦热分析（英文）  

Analysis of the sliding friction heat of wheel/rail under different ambient temperature

作　　者：饶贝 张晋西[1] 陈江洪[1] 肖思伟 

机构地区：[1]重庆理工大学,重庆400054

出　　处：《机床与液压》2017年第6期96-99,113,共5页Machine Tool & Hydraulics

摘　　要：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 ambient temperature is objective existence of natural phenomena in the process of wheel/rail slid- ing. The surface temperature of wheel/rail and the number of heat between the wheel/rail and air could be deter- mined by the size of the ambient temperature. Ambient temperature is taken to be 20℃ in the analysis of the wheel/rail sliding contact by most researchers. The analysis of three dimensional thermal elastic-plastic of wheel/ rail sliding state is implemented by using the finite element software of ABAQUS. The change of temperature field and the changing characteristics of wheel/rail contact area are analyzed in different ambient temperature under specified sliding speed. The results show that the increase of ambient temperature will not cause the huge change of temperature field of wheel/rail contact region, and the effect of numerical change of ambient temperature on wheel/rail sliding friction contact is relatively small. The present study proved that ambient temperature of heat is relatively small as compared to the wheel/rail friction heat and it has little influence on the results of numerical simulation. Therefore, the ambient temperature can be taken as a constant value in the numerical simulation of wheel/rail.

关 键 词：轮轨接触 滑动 环境温度 温度场 

分 类 号：TG115.58[金属学及工艺—物理冶金]