速度350 km/h高速列车车体时间常数气密阈值特性初探  

Study on Air-tightness Coefficient Threshold Characteristics of CR400BF EMUs in Mountain Tunnels at Speed of 350 km/h

作　　者：马瑶 王雷 梅元贵[1] MA Yao;WANG Lei;MEI Yuangui(Gansu Province Engineering Laboratory of Rail Transit Mechanics Application Engineering Lanzhou Jiaotong University,Lanzhou 730070 Gansu,China;CRRC Changchun Railway Vehicles,Co.,Ltd.,Changchun 130062 Jilin,China)

机构地区：[1]兰州交通大学甘肃省轨道交通力学应用工程实验室,兰州730070 [2]中车长春轨道客车轨道股份有限公司,长春130062

出　　处：《铁道机车车辆》2019年第5期47-52,69,共7页Railway Locomotive & Car

基　　金：国家重点研发计划(2016YFB1200506)

摘　　要：高速列车通过隧道时产生较大压力波动,瞬态压力变化的同时由车外向车内传递,车内外压力波动对车体形成剧烈的气动载荷,将影响车体使用寿命。同时,不同时间间隔内车内压力变化率同司乘人员的乘坐舒适度密切相关,探讨不同时间间隔标准下高速列车通过不同长度隧道时车辆自身的动态时间常数值具有重要意义。基于国内单双线隧道基础参数和CR400BF型动车组相关技术参数,应用一维可压缩不等熵流动模型的广义黎曼变量特征线方法计算列车通过隧道过程中车内外压力波动随时间历程特性,归纳车内外最大正压值、最大负压值、车外压力峰峰值和车内外同时刻压差最大值的变化规律。按照中国、德国、ERRI、UIC不同标准舒适度标准要求计算列车所需达到的时间常数气密阈值,比较4种标准下时间常数气密阈值随隧道长度增加的变化规律。High-speed trains produce large pressure fluctuations when passing through tunnels.Transient pressure changes are transmitted from the outside to the inside of the train at the same time.Pressure fluctuations inside and outside the train form severe aerodynamic loads on the car body,which will affect the service life of the car body.Meanwhile,the change rate of the pressure in the train in different time intervals is closely related to passenger and steward comfort.It is of great significance to discuss the dynamic time constant value of the vehicle itself when the high-speed train passes through tunnels of different lengths under different time interval standards.Based on the character of universal tunnel and CR400BF designed by China independently,this paper is applied to one-dimensional,compressible,no-constant and the method of characteristics of generalized Riemann variables.Generalize maximum positive pressure value,the maximum negative pressure,the peak-to-peak value and the value of the pressure difference between train inside and outside.According to the comfort criteria prescribed by China,Germany,ERRI and UIC.Calculating the tightness coefficient threshold.Final compare the variation of the air-tightness coefficient threshold with the increase of tunnel length and the four standards above mentioned.

关 键 词：高速列车 压力波 特征线法 山区隧道 气密性能 

分 类 号：U260.11[机械工程—车辆工程]