城市轨道交通线路曲线段钢轨磨耗预测
李书玉1李龙2祁亚运3李洁1毛文慧4
Rail Wear Prediction of Urban Rail Transit Line Curve Section
LI ShuyuLI LongQI YayunLI JieMAO Wenhui
-
作者信息:1.重庆市轨道交通(集团)有限公司， 401120， 重庆
2.包头北方创业有限责任公司， 包头， 014032
3.重庆交通大学机电与车辆工程学院, 400074， 重庆
4.中车成都机车车辆有限公司， 610511， 成都
-
Affiliation:Chongqing Rail Transit (Group) Co., Ltd., 401120, Chongqing, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2023.06.010
-
中图分类号/CLCN:U213.42
-
栏目/Col:研究报告
摘要:
为了精确预测钢轨磨耗，以及为工务部门进行钢轨打磨和线路维护提供指导，建立了城市轨道交通车辆 轨道耦合动力学模型，采用Hertz FASTRIP（FastStrip） USFD(University of sheffield)模型对钢轨磨耗进行了计算，对城市轨道交通线路曲线段钢轨磨耗的演变规律进行了预测。结果表明：LM型踏面与60 kg/m钢轨(以下简称“60钢轨”)接触时，其轮轨接触区域较大，且横移量较大时轮缘接触频繁。LM型踏面与60D钢轨接触时，其轮轨接触点在轨顶区域比较集中;相较60钢轨接触,其等效锥度更小，有利于车辆稳定运行;轮轨接触点集中在滚动圆附近，轮对横移量小于7 mm时，接触斑面积较小，法向应力较大，磨耗功较小。60D钢轨减轻了曲线外侧钢轨磨耗，且其在曲线外侧磨耗整体小于60钢轨。通过总重为5 Mt时，缓和曲线段60D钢轨最大磨耗深度为0.48 mm，相比60钢轨减小44.18%；圆曲线段60D钢轨最大磨耗深度为1.43 mm，相比60钢轨减小22.7%。60D钢轨可以进一步改善轮轨接触关系，并有效减小城市轨道交通线路曲线段的钢轨磨耗。
Abstracts:
To accurately predict rail wear and provide guidance to track work department for rail grinding and line maintenance, an urban rail transit vehicle track coupling dynamics model is established, using Hertz FASTRIP（FastStrip） USFD(University of sheffield) model for rail wear calculationto predict the development law of urban rail transit line curve section rail wear. Results show that: when LM tread contacts 60D rail surface, the wheel rail contact points are relatively concentrated in rail top area. When LM tread contacts 60 kg/m rail (hereinafter referred to as 60 rail), the wheel rail contact area is larger, and the wheel flange contact is frequent when the lateral displacement is larger. The equivalent conicity is smaller when LM tread contacts 60D rail surface, which is conducive to the stable operation of the vehicle. LM tread and 60D rail contact points is concentrated near the rolling circle, and the contact patch area is smaller when the lateral displacement is less than 7 mm, the normal stress is larger, and the wear power is smaller. 60D rail reduces the curve outer rail wear, and its overall curve outer rail wear is less than that of 60 rail. When passing the transition curve section with total gross load of 5 Mt, the 60D rail has largest wear depth of 0.48 mm, 44. 18% less than that of 60 rail. The maximum wear depth of 60D rail in circular curve section is 1.43 mm, 22.7% less than that of 60 rail. 60D rail can further improve wheel rail contact relation, effectively reducing urban rail transit line curve section rail wear.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 5G公专网支撑城市轨道交通“绿智融合”发展
过刊浏览
资料下载
友情链接