A Study On Characteristics Of Train Wind And Its Impacts On Personnel Security On The Underground Platform Of Inter-city Railway

In recent years, with the acceleration of the inter-city railway construction, increasing of the number of the underground station and the speed of the train,the impacts of train wind on personnel security are more serious.But at present,the study on train wind on inter-city underground platform is less at home and abroad. In this paper, relying on two National Natural Science projects (U1134208,51008310), a numerical simulation method is used to analyze characteristics of train wind and the effect on people on inter-city underground platform.The following works were completed:(1) According to the design parameters of Kaifusi Station of Chang-Zhu-Tan inter-city railway, the Tunnel-Station-Train Wind simulation model was established by the use of computational fluid dynamics software FLUENT. Two kinds of operation conditions were simulated:â‘ In the island platform,a single train was travelling through the station;â‘¡In the side type platform,A train stopped in the station and another train was travelling through the station.(2) The train wind time-varying process of a point in tunnel was analyzed, from which we could get the variations of train wind of the point, including the speed and the direction(angle) of the wind; Also the trend of train wind change when the train was travelling through the tunnel was studied by the comparative analysis of The train wind time-varying process on the same location on different sections.(3) The spatial flow field in station at some time point was analyzed, from which we could get the longitudinal and horizontal distribution characteristics of train wind in station,including wind velocity and direction.(4) Under different conditions in the station,the train wind characteristics were analyzed in detail.and the variations of the station train wind were summarized.. (5) According to the results of different conditions, the safety of staffs on the platform was judged and the safety zone of them was determined with the control standard of the greatest force and speed which the station staffs can bear.