阵风下地铁列车曲线通过安全性研究*
谢小山王为林陈彦恒
Study on Metro Train Safety When Passing through Curved Section under Gust
XIE XiaoshanWANG WeilinCHEN Yanheng
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作者信息:郑州铁路职业技术学院铁道工程学院，451460，郑州
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Affiliation:Railway Engineering College, Zhengzhou Railway Vocational & Technical School, 451460, Zhengzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.10.010
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中图分类号/CLCN:U270.1+1
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栏目/Col:研究报告
摘要:
基于山地环境下城市轨道交通线路实际，建立了地铁列车曲线通过动力学模型及阵风载荷模型，并确定了列车运行安全性评价指标。研究了阵风下车辆曲线通过基本特性，并计算得出了阵风下地铁列车安全运行的曲线半径及风速安全限值。结果表明，横风载荷均在风攻角为90°附近出现了极大值；头车对的阵风影响最为敏感；圆曲线半径增大有利于提高列车运行安全性，在预设条件下，圆曲线半径不能小于840 m；风速的增加会使列车运行安全性变差，在预设条件下，风速不得超过17.5 m/s以保障列车运行安全。
Abstracts:
According to the actual construction of metro lines in mountain city, firstly a dynamic model of metro train-route and a load model for Chinese Hat Gust are established, and the operation safety evaluation index are determined. Then, the basic characteristics of train passing curved section under gust are studied, the curve radius and wind speed safety limits for metro train operating safely under gust are obtained by calculation. The results show that crosswind load reaches the maximum value when the wind attacking angle is around α=90°; the first vehicle is most sensitive to the impact of gust; increasing radius may contribute to safety improvement, and under preset conditions, the radius should be no less than 840 m; increasing wind speed may worsen the safety, and under preset conditions, wind speed should be no more than 17.5 m/s to maintain the safe operation.
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