横风下高速列车突入隧道瞬变压力及列车风  

Transient pressure and train wind during high-speed train entering a tunnel under crosswind

作　　者：王磊[1,2,3] 骆建军[1,2,3] 李飞龙[1,2,3] WANG Lei;LUO Jianjun;LI Feilong(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Key Laboratory of Urban Underground Engineering of the Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京交通大学城市地下工程教育部重点实验室,北京100044 [3]北京交通大学结构风工程与城市风环境北京市重点实验室,北京100044

出　　处：《振动与冲击》2022年第3期27-36,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金(51678036)。

摘　　要：针对高速列车在横风下突入隧道的普遍情形,考虑空气的非定常、可压缩湍流特性,建立列车-隧道-横风三维数值模型,对比研究有无横风条件下列车突入过程中隧道内的瞬变压力变化规律和列车风特性。通过将数值计算结果与现场实测数据进行对比,验证了数值方法的准确性。研究结果表明:与无横风情况相比,列车在横风中高速驶入时隧道入口周围的瞬变压力和列车风发生明显变化;在尾车完全驶入前,横风对背风侧气动压力的影响程度比迎风侧的大,其中头车突入时对隧道入口气动压力的影响最为显著;横风对隧道内气动压力和列车风的影响范围有限,当横风速度为24.4 m/s时,隧道内受影响距离为50 m;头车突入隧道时,横风对列车背风侧列车风的影响较大,而尾车完全驶入时,横风对列车迎风侧的列车风的影响比较严重。横风效应是列车背风侧气动压力和气流速度大幅波动的根本原因。Here,aiming at the general case of high-speed train passing through a tunnel under crosswind,considering unsteady and compressible turbulence characteristics of air,a 3D numerical model of train-tunnel-crosswind was established to study contrastively variation laws of transient pressure and train wind characteristics during train passing through a tunnel with or without crosswind.The correctness of the numerical method was verified by comparing the numerical computation results with the onsite actually measured data.The results showed that compared with the case without crosswind,transient pressure and train wind around tunnel entrance change obviously when train at high speed enters tunnel under crosswind;before train’s tail car completely enters tunnel,effects of crosswind on aerodynamic pressure on train’s leeward side is larger than those on aerodynamic pressure on train’s windward side,and effects of crosswind on aerodynamic pressure at tunnel entrance during train’s head car entering tunnel is the most significant;influence range of crosswind on aerodynamic pressure and train wind in tunnel is limited,when crosswind speed is 24.4 m/s,the affected distance in tunnel is 50 m;when train’s head car enters tunnel,crosswind has a larger impact on train wind on train’s leeward side,while when train’s tail car completely enters tunnel,crosswind has a more serious impact on train wind on train’s windward side;crosswind effect is the fundamental reason for large fluctuation of aerodynamic pressure and airflow speed on train’s leeward side.

关 键 词：高速列车 隧道 横风 瞬变压力 列车风 流场 

分 类 号：U25[交通运输工程—道路与铁道工程] U266.2[机械工程—车辆工程]