摘要
列车在隧道中运行时要克服的行车阻力为压差阻力和摩擦阻力两方面,克服阻力做功所产生的热量将会散发到隧道内部,影响高寒地区隧道内热环境.结合高寒地区隧道工程实例,考虑高寒地区实际大气压、列车将来可能的提速和高寒地区高速铁路的修建,运用动网格技术,考虑对列车以现行速度运行、快速运行、高速运行时在隧道内需要克服的行车阻力进行了研究,得到了列车运行至隧道中部时的车头车尾之间的压差阻力和列车壁面与空气之间的摩擦阻力.结果表明,列车在隧道中运行时需要克服的压差阻力远大于摩擦阻力,且行车阻力随着列车运行速度的增大而增大,可为高寒地区铁路提速和高速铁路修建提供参考.
The driving resistance that the train needs to overcome includes two aspects when the train is running in the tunnel,which are pressure difference resistance and friction resistance.The heat generated by overcoming resistance and doing work will be emitted into the tunnel and influence the heat environment of the tunnel in permafrost region.Based on the actual existence of the tunnel in permafrost region,in view of the actual atmospheric pressure in permafrost regions,speed increase of the train in the future and the construction of high speed railway in permafrost regions,the dynamic grid technology is used to research the driving resistance when the train moves through the tunnel on a slower speed,rapid speed and high speed.As a result,when the train reaches the middle of the tunnel,the pressure difference resistance andfrictional shear stress of the train wall are obtained.The research results show that when the train is running in the tunnel,the pressure differential resistance that the train needs to overcome is much greater than the friction resistance,and the driving resistance increases with the train speed increasing.It also provides a reference basis for the speed increase of the train in the future and the construction of high speed railway in permafrost regions.
作者
苟胜荣
吴亚平
GOU Shengrong;WU Yaping(Yangling Vocational and Technical College,Xianyang 712100,Shaanxi China;Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《河南科学》
2018年第2期245-250,共6页
Henan Science
基金
中国铁路总公司科技研究开发计划课题(2015G005-C)
杨凌职业技术学院自然科学研究基金项目(A2017017)
关键词
寒区隧道
高速铁路
压差阻力
摩擦阻力
cold regional tunnel
high-speed railway
pressure difference resistance
frictional resistance
