地铁列车隧道运行气动特性分析
Analysis of Aerodynamic Characteristics of a Subway Train Running in the Tunnel
陈倩茹 1刘志华1
作者信息
- 1. 湖南铁路科技职业技术学院,湖南 株洲 412006
- 折叠
摘要
本文探究某市 4号线地铁列车在隧道中运行的气动效应,采用STAR-CCM商业软件,模拟地铁列车在最不利隧道运行的情况,对地铁列车的阻力系数、列车表面压力和车内压力变化等参数进行分析,从而对城市地铁的安全运营以及乘客舒适度保障有一定参考价值.根据数据分析,得到以下结论:一是地铁列车的阻力系数,呈现出头车和尾车的阻力系数大于中间 4 节车厢的规律;二是在车内压力变化方面,头车的压力变化情况最恶劣,从头车到尾车依次减弱;三是在车辆技术参数相同的情况下,头车车内压力变化大于尾车,从头车到尾车,程度依次递减.通过计算可得,该线路地铁气密指数不得小于 1s,最好大于等于 3s.
Abstract
In this paper,the aerodynamic effect of subway trains running in the tunnel of Line 4 in a city is investigated.STAR-CCM commercial software is used to simulate the situation of subway trains running in the most unfavorable tunnel.This paper analyzes the resistance coefficient of subway train,the pressure on the surface of the train and the change of the pressure inside the train,so as to have certain reference value for the safe operation of urban subway and the guarantee of passenger comfort.According to the data analysis,the following conclusions can be drawn:firstly,the resistance coefficient of the front car and the rear car is greater than that of the middle four cars;secondly,in terms of the pressure change in the subway,the pressure change of the head car is the worst,and the head car is weakened in turn from the beginning to the tail car;thirdly,in the case of the same vehicle technical parameters,the interior pressure change of the first car is greater than that of the tail car,and the degree decreases from the head car to the tail car.According to the calculation,the airtightness index of the subway line should not be less than 1s,preferably greater than or equal to 3 s.
关键词
地铁列车/隧道运行/气动特性/乘客舒适度/阻力系数Key words
subway train/running in the tunnel/aerodynamic characteristic/passenger comfort/drag coefficient引用本文复制引用
基金项目
2021年湖南省教育厅项目(21C1317)
出版年
2024
NETL
NSTL
万方数据