摘要
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。
A thermal-structure coupling simplified model of wheel-rail sliding friction heating was established by using ANSYS finite element software. The temperature field and thermal stress field was analyzed on the basis of specified loads, friction coefficient and relative sliding velocity of the wheel-rail. The results show that the effect of the material parameters varying with temperature variation needs to be considered when the wheel-rail is under sliding friction. Heat affected zone locates in a very thin layer of wheel-rail surface, and heat stress is very high in this layer. The thermal effect of wheel and rail is much more obvious as the load, the friction coefficient and the relative sliding velocity are increased. The analysis of thermal effect issues of wheel-rail during wheel sliding will help to reveal the wear mechanism of surface in the contact process.
出处
《机械设计》
CSCD
北大核心
2011年第4期10-15,共6页
Journal of Machine Design
基金
国家重点基础研究发展计划(973计划)资助项目(2007CB714702)
国家863计划资助项目(2009AA04Z424)
国家科技支撑计划资助项目(2009BAG12A01-B05-1)
关键词
轮轨摩擦
热应力
温升
有限元
wheel-rail friction
thermal stress
temperature rise
finite element method
