The Aerodynamic Effect Of High-speed Railway Ancillary Facilities Within The Tunnel

With the rapid development of high-speed railway in the world, the construction of high-speed railway in China is entering a golden period, Beijing-Tianjin inter-city passenger line, Tsingdao-jinan inter-city passenger line, wuhan-guangzhou inter-city passenger line have been put in to operation one after another, Because of the smoothness requirements of high-speed railway and the huge number of mountains in our country, lots of tunnels will be constructed in the future, so the aerodynamics effects of tunnel when the high-speed train running is coming, especiallyin terms of the ancillary facilities in tunnels, it is particularly important to conduct the safety analysis of it.According to the technology development project of the Ministry of Railways—the technical standards research of the ancillary facilities in tunnels caused by the aerodynamic effect during high-speed train's running, the pressure variation, distribution of wind speed and safety of the ancillary facilities are researched by using a numerical computation. The major tasks are given as follow:(1)Through extensive investigation and study of literature, the problems in the current research on the aerodynamics effects of high-speed railway tunnel is analyzed, and a reasonable calculation method and calculation software is determined.(2)According to the tunnel size of high-speed railway and the actual situation of trains in our country, three-dimensional numerical models are established,and then studied the pressure distribution and train blast features under different conditions,the peak value of pressure and wind speed are obtained to research the maximum shock pressure to the ancillary facilities.(3) The reliability of the numerical results is demonstrated compared to the existing research and theoretical analysis.(4) According to numerical results and the existing conduction technical standards of high-speed railway tunnel, safety of the ancillary facilities is done,especially to the force and stability of overhead line system and drain cover.