摘要
列车通过隧道时引起的空气动力效应会对列车运行的安全性、乘客乘坐的舒适性等产生不良影响。基于列车空气动力学理论,采用计算流体力学软件FLUENT对某型号地铁车辆通过最不利长度隧道时的空气动力学性能进行数值模拟,得到并分析了地铁列车和隧道壁面监测点的压力时程曲线和分布特征。研究表明:车体表面压力峰峰值、3 s内车内压力波动最大值及隧道内附属物压力峰峰值,与列车速度的平方近似成线性关系;隧道断面净空面积越小,车体承受的压力越大;地铁列车通过隧道时需限速,以达到人体舒适性评价标准。
The aerodynamic effect induced by a train when entering a tunnel has negative influence on the train run- ning safety and passengers＂ comfort. Based on aerodynam- ics, the pressure temporal curves and pressure distribution characteristics of metro vehicle and long tunnels are ana- lyzed according to the numerical simulation with software FLUENT. The results show that the amplitude of pressure on the carbody, the maximum of internal pressure fluctua- tion during three seconds, the peak-to-peak pressure value of ancillary facilities in tunnels are approximately propor- tional to the square of car speed. In addition, the smaller the tunnel cross-section area is, the lager pressure that the carbody has to bear. In order to satisfy the standard re- quirements of human body comfort, the train speed should be constrainted when the metro vehicle is running in tunnels.
出处
《城市轨道交通研究》
北大核心
2016年第9期99-104,共6页
Urban Mass Transit
基金
高速铁路基础研究联合基金资助项目(U1234208)
国家自然科学基金面上项目(51475394)
牵引动力国家重点实验室自主课题(2016TPL_T02)
