摘要
对于高寒区隧道,列车运行产生活塞风会影响隧道内空气与衬砌围岩之间的对流换热,进而影响隧道结构的安全性和使用寿命.结合高寒地区隧道工程实例,运用动网格技术真实地模拟了列车进入隧道、在隧道中持续运行和驶出隧道的全过程,对列车以现行速度运行、快速运行、高速运行时在隧道内引起空气动力学效应进行了研究,分析了活塞风风速的变化规律,得到了列车头部进入隧道和列车尾部离开隧道的时间段内隧道内活塞风风速和列车速度之间的关系.结果表明,无论是列车头部刚驶入隧道时刻还是列车尾部离开隧道的时刻,隧道内的活塞风风速总是随着列车运行速度的增大而增大,为高寒地区高速铁路修建提供参考.
For the tunnel in permafrost region,the piston wind is produced by the moving train which willinfluence the heat convection between air and surrounding rock.Based on the actual existence of the tunnel inpermafros region,the dynamic grid technology is used to imitate all the processes during the train moves into thetunnel and left the tunnel.The change rule of the piston wind speed is researched when the train moves through thetunnel on a slower speed,a rapid speed and a high speed.As a result,during the train moves into the tunnel and leftthe tunnel,the relationship between the piston wind speed and the train speed are evaluated.The research resultsshow that when the train moves into the tunnel and left the tunnel,the piston wind speed is increased by the trainspees increases.It also provides a reference basis for the construction of the high-speed railway in the region.
作者
苟胜荣
吴亚平
付江涛
GOU Shengrong;WU Yaping;FU Jiangtao(Yangling Vocational and Technical College,Yangling 712100,Shaanxi China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Shaanxi University of Technology,Hanzhong 723001,Shaanxi China)
出处
《河南科学》
2017年第3期432-436,共5页
Henan Science
基金
中国铁路总公司科技研究开发计划课题(2015G005-C)
杨凌职业技术学院科学研究基金项目(A2015019)
关键词
寒区铁路
隧道
活塞风
the railway in permafrost region
tunnel
piston wind
