원문정보
초록
영어
A numerical simulation on the 3D compressible viscous unsteady flow field induced by a high-speed subway train, while it’s passing by the platform screen door of subway station, is presented in the paper. The research on transient pressure in tunnel due to changes of positions of platform screen door is proceeded in order to design platform screen doors for underground stations of Dong-guan to Huizhou inter-city rail traffic. Result shows that the platform is subjected to aerodynamic compression and tension cycle loads all the time. And compression load is larger than tension load. The maximum and minimum pressure values in absolute terms got from measuring points of the whole station decrease gradually along the direction train going ,no matter whether the platform screen door is fixed or not. The absolute values of maximum and minimum pressure of piston wind generated at platform screen door are decreasing while the spacing between platform screen door and platform becomes wider. The pressure value of air at exit is larger than that of air at entrance. As for a high-speed subway station, it is a practicable way to set air shafts at entrance and exit of station to mitigate pressure of air in station and tunnel. The pressure value of air could have a 10 to 15 percent reduction if there is an air shaft. Besides, the platform screen door can be installed in half tall of PSD.
목차
1. Introduction
2. Control Equation
3. Basic Conditions and Calculation Method
4. The Calculation Results and Analysis
4.1. The Effect of Pressure Changes in Tunnel Pulling Section
4.2. Pressure Changes in Tunnel Cavity that Within the Scope of Station Screen Door Section
4.3. Pressure Changes in Station Exit Section Tunnel
4.4. The Maximum Regulation of Pressure Change at Each Measuring Point Within the Scope of the Station
4.5. Change of the Piston Wind at the Location of Station Screen Door
4.6. The Decompression Effect of Air Vents on Both Ends of the Station
5. The Conclusions and Suggestions
Acknowledgments
References