| 全制动工况下轮轨热-机耦合效应的分析 |
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| 引用本文： | 郭俊,赵鑫,金学松,刘启跃.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. |
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| 作者姓名： | 郭俊 赵鑫 金学松 刘启跃 |
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| 作者单位： | 西南交通大学,牵引动力国家重点实验室,四川,成都,610031 |
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| 基金项目： | 四川省应用基础研究计划，国家自然科学基金 |
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| 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.
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| 关 键 词： | 轮轨摩擦 温度场 热应力 接触单元法 有限元 |
| 文章编号： | 1004-0595（2006）05-0489-05 |
| 收稿时间： | 2005-10-21 |
| 修稿时间： | 2006-02-20 |
Analysis of Wheel/rail Thermo-Mechanical Coupling Effects in Sliding Case |
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| GUO Jun,ZHAO Xin,JIN Xue-song,LIU Qi-yao.Analysis of Wheel/rail Thermo-Mechanical Coupling Effects in Sliding Case[J].Tribology,2006,26(5):489-493. |
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| Authors: | GUO Jun ZHAO Xin JIN Xue-song LIU Qi-yao |
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| Institution: | State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China |
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| 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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| Keywords: | wheel/rail friction temperature distribution thermal stress contact element method finite element method |
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