• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (4): 142-149.doi: 10.3901/JME.2018.04.142

• 轮轨接触关系 • 上一篇    下一篇

钢轨磨耗对轮轨滚动接触关系的影响研究

丁军君1, 李东宇2, 王军平2, 李芾1   

  1. 1. 西南交通大学机械工程学院 成都 610031;
    2. 中铁物轨道科技服务集团有限公司 北京 100036
  • 收稿日期:2017-06-22 修回日期:2017-12-20 出版日期:2018-02-20 发布日期:2018-02-20
  • 作者简介:丁军君,男,1985年出生,博士,讲师。主要研究方向为机车车辆系统动力学和轮轨关系。E-mail:dingjunjun@swjtu.cn;李东宇,男,1989年出生,硕士,工程师。主要研究方向为轮轨关系和钢轨打磨技术;王军平,男,1988年出生,硕士,工程师。主要研究方向为轮轨关系和钢轨打磨技术;李芾,男,1956年出生,博士,教授。主要研究方向为机车车辆设计理论。E-mail:lifu@swjtu.cn
  • 基金资助:
    国家自然科学基金(51305359)和中央高校基本科研业务费专项资金(2682016CX029)资助项目

Effect of Rail Wear on Wheel/rail Rolling Contact Conditions

DING Junjun1, LI Dongyu2, WANG Junping2, LI Fu1   

  1. 1. School of Mechanical Engineering, Southwest JiaoTong University, Chengdu 610031;
    2. China Railway Materials Track Technology Service Group CO., LTD. Beijing 100036
  • Received:2017-06-22 Revised:2017-12-20 Online:2018-02-20 Published:2018-02-20

摘要: 钢轨廓形会随着磨耗的发展而发生明显改变,并对轮轨接触关系产生影响。以国内某客货共运干线铁路的小半径曲线为例,跟踪采集钢轨廓形,并测量通过该线路的客车和货车车轮廓形。对不同磨耗阶段的钢轨型面对应的轮轨共形接触和轮轨导向能力进行分析,并结合车辆-轨道动力学模型对多车轮条件下的轮轨接触位置分布特征和钢轨表面滚动接触疲劳损伤系数进行计算。结果表明:随着钢轨的不断磨耗,轮轨共形接触的概率先下降后上升,同时转向架导向轮对的轮轨导向能力先减弱后加强,而从动轮对的导向能力逐渐减弱。上股钢轨的轮轨接触宽度由25 mm扩大到45 mm,下股钢轨由27 mm扩大到45 mm,同时上股钢轨轨顶和轨距角处接触频率逐渐增加,轨肩位置处的接触频率逐渐减小。钢轨表面的累积滚动接触疲劳损伤系数先减小后增大,疲劳损伤区域逐渐向轨顶扩展,甚至达到轨顶外侧位置。

关键词: 钢轨磨耗, 滚动接触疲劳, 轮轨导向, 轮轨接触

Abstract: With the wear, rail profiles will change and influence the wheel/rail contact condition. The rail profiles of a selected sharp curve, with both passenger and freight running on it, are measured after different periods. A large number of wheel profiles from freight vehicles and passenger vehicles running on the selected curve are measured too. The wheel/rail conformal contact probabilities and steering abilities of the rails in different periods are calculated. According to the vehicle dynamical simulation results, the distribution of wheel/rail contact points and rolling contact fatigue indices on rail are analyzed and the simulation results are compared with the rail surface status.The results indicate that the probability of wheel/rail conformality and the steering ability of guide wheelsets descend first and then rise with rail wear, as well as the steering ability of non-guide wheelsets weakened gradually. The contact bands of high rail expand from 25 mm to 45 mm, and the contact bands of low rail expand from 27 mm to 45 mm. With the rail wear, the contact frequency of top rail and gauge corner increased and the contact frequency of rail shoulder decreased. The accumulation rolling contact fatigue damage indices in rail surface descend firstly and then rise with wear, and the fatigue damage area expand even out of the top of rail.

Key words: rail wear, rolling contact fatigue, wheel/rail contact, wheel/rail steering

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