摘要：随着高速铁路技术的飞速发展，关于动车组技术的研究越来越深入，其中就包括关于轮轨接触摩擦生热的研究。随着列车速度的加快，轮轨间的磨耗越来越严重，摩擦生热的程度也越来越严重，无论是轮轨磨耗还是摩擦生热，对列车轮对和轨道的影响都很大，过大的轮轨磨耗和摩擦生热会致使轮对发生变形，会导致轨道产生不平顺，因此研究轮轨摩擦和轮轨接触应力有十分重要的意义。本论文主要研究的是轮轨摩擦和轮轨温度以及应力变化，主要根据有限元的分析方法还有计算分析方法，通过对轮轨接触部分进行有限元的分析方法，通过有限元分析软件来反映轮轨接触部分的热量变化，热应力变化以及温度场的变化。轮轨间的摩擦生热的程度大小主要与轴重和列车速度的大小有关系，轴重的增加和速度的增加都会导致轮轨接触应力以及摩擦生热程度的加重。81030

毕业论文关键词： 摩擦生热；轮轨接触；有限元；热应力

Analysis of the Influence of Friction Heat on Magnetic Memory

Abstract：With the rapid development of high-speed railway technology, the research on EMU technology is more and more in-depth, including research on wheel-rail contact friction heat generation。 With the speed of the train to speed up the grinding wheel between the wear and tear more and more serious, the degree of friction and heat more and more serious, whether it is wheel or rail wear or friction heat, the wheels of the wheel and the impact of the track are great, Excessive wheel-rail wear and friction heat will cause the wheel to be deformed, which will cause the track to be uneven。 Therefore, it is very important to study the wheel-rail friction and the wheel-rail contact stress。 In this paper, the main research is the wheel-rail friction and the wheel-rail temperature and the stress change。 Based on the finite element analysis method and the calculation method, the finite element analysis method of the wheel-rail contact part is analyzed by finite element analysis software The change of heat, the change of thermal stress and the change of temperature field。 The degree of friction between the wheel and the wheel is mainly related to the magnitude of the axle load and the speed of the train。 The increase of the shaft weight and the increase of the speed result in the increase of the contact stress of the wheel and rail and the increase of the friction heat。

KeyWords:  Friction heat；Wheel and rail contact；Finite element；The thermal stress

目录

1绪论 1

  1。1 选题的目的和意义 1

  1。2 Ansys在摩擦接触方面的应用 2

  1。3 本论文的主要工作 4

2摩擦生热的相关理论 5

  2。1 赫兹接触理论 5

  2。2 固体摩擦理论 6

  2。3 传热学理论 6

  2。4 本章小结 8

3建模和静力分析 9

  3。1 几何模型的建立 9

  3。2 静态分析 11

  3。3本章小结 13

4摩擦生热分析 14

  4。1 建立摩擦生热模型 14

  4。2仿真结果及分析 15

  4。3 本章小结 19