ISSN   1004-0595

CN  62-1095/O4

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全制动工况下轮轨热-机耦合效应的分析[J]. 摩擦学学报, 2006, 26(5): 489-493.
引用本文: 全制动工况下轮轨热-机耦合效应的分析[J]. 摩擦学学报, 2006, 26(5): 489-493.
Analysis of Wheel/rail Thermo-Mechanical Coupling Effects in Sliding Case[J]. TRIBOLOGY, 2006, 26(5): 489-493.
Citation: Analysis of Wheel/rail Thermo-Mechanical Coupling Effects in Sliding Case[J]. TRIBOLOGY, 2006, 26(5): 489-493.

全制动工况下轮轨热-机耦合效应的分析

Analysis of Wheel/rail Thermo-Mechanical Coupling Effects in Sliding Case

  • 摘要: 采用有限元法从摩擦热效应角度探寻轮轨表面破坏的原因,建立了轮轨热-机械载荷耦合接触模型,分析纯滑动接触过程中轮轨的温升以及热应力,模型中考虑了轮轨间非稳态热传导、与环境的热对流和热辐射以及轮轨间的接触计算,分析了滑动接触过程中应力场的分布特点以及速度的影响.结果表明:所采用的接触算法能够求解二维轮轨全制动工况下的热接触问题;轮轨摩擦热效应只存在于表层,其影响随着深度增加而减小;轮轨的相对滑动速度越高,其热效应越明显.

     

    Abstract: Temperature rise and thermal stress due to wheel/rail friction play an important role in the failure of wear,flatting and checking.A thermal-mechanical coupling contact model of wheel/rail in sliding contact was put forward to calculate the temperature rise and thermal stress with finite element method.The non-steady heat conduction between the contacting surfaces of the wheel/rail,heat-convection and radiation between the wheel/rail and an ambient were taken into consideration.The contact pressure distribution was obtained by contact element method.The thermal effects only exist in the thin layer of wheel/rail,and its offect decreased as depth increased.Higher sliding speed leads to stronger thermal effects.

     

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