市域列车隧道断面突变位置气动特性
张宝珍1,2谢红兵1,2孟令锋1,2戴隆明1,2南喆1,2熊小慧3
Aerodynamic Characteristics of City Railway Train at the Sudden Variable Tunnel Cross-Section Positions
ZHANG Baozhen1,2XIE Hongbing1,2MENG Lingfeng1,2DAI Longming1,2NAN Zhe1,2XIONGXiaohui3
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作者信息:1.中车株洲电力机车有限公司，412001，株洲
2.重载快捷大功率电力机车全国重点实验室，412001，株洲
3.中南大学轨道交通安全教育部重点实验室，410075，长沙
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Affiliation:1.CRRC Zhuzhou Locomotive Co., Ltd., 412001, Zhuzhou, China
2.The State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive, 412001, Zhuzhou, China
3.Key Laboratory of Traffic Safety on Track, Central South University, 410075, Changsha, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.12.039
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中图分类号/CLCN:U451.3; U270.11
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栏目/Col:研究报告
摘要:
［目的］为了确保列车运营安全性与旅客乘坐舒适性，需研究市域列车过隧道内变截面位置(进站台、隧道内运行、过中间风井)时的气动力和车内压力变化规律。［方法］以8节编组的市域列车为例，建立数值计算模型；开展隧道变截面处气动性能数值仿真研究，分别对列车车体表面压力、隧道壁面压力、列车气动力、车内压力变化情况进行分析。［结果及结论］列车车体表面压力、气动载荷的变化规律为：列车进站时的表面压力和横向力＞列车经过中间风井时的表面压力和横向力＞列车在隧道内运行时的表面压力和横向力。车体表面压力幅值与列车运行速度的1.4~2.0次方呈线性关系；隧道壁面压力与列车运行速度的1.79~2.10次方呈线性关系；车体横向力与列车运行速度的1.8~2.0次方呈线性关系，倾覆力矩与列车运行速度的1.6~2.0次方呈线性关系。市域列车气密性设计能满足隧道内变截面位置处，车内压力变化不大于每3s内压力变化800Pa和每1s内压力变化500Pa的人体舒适性标准要求。
Abstracts:
［Objective］ In order to ensure train operation safety and passenger comfort, it is necessary to study the changing laws of aerodynamic force and pressure inside the city railway train when passing through the variable cross-section positions in the tunnel (entering the platform, running in the tunnel, and passing through the intermediate air shaft). ［Method］ Taking the 8-carriage city railway train as an example, a numerical calculation model is established. A numerical simulation study on the aerodynamic performance at the variable tunnel cross-section is carried out, and the changes in the train body surface pressure, tunnel wall pressure, train aerodynamic force, and pressure inside the train are analyzed respectively. ［Result & Conclusion］ The changing laws of train body surface pressure and aerodynamic load are as follows: the surface pressure and lateral force with train entering the station > the surface pressure and lateral force with train passing through the intermediate air shaft > the surface pressure and lateral force when the train runs into the tunnel. The train body surface pressure amplitude is linearly related to the 1.4 ~ 2.0 power of the train running speed; the tunnel wall pressure is linearly related to the 1.79 ~ 2.10 power of the train running speed; the train body lateral force is linearly related to the 1.8 ~ 2.0 power of the train running speed, and the overturning moment is linearly related to the 1.6 ~ 2.0 power of the train running speed. The air-tightness design of the city railway train can meet the human comfort standard requirements, namely the pressure change inside the car at the variable tunnel cross-section positions shall not exceed 800 Pa per 3 seconds and 500 Pa per 1 second.
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