Analysis of the Impact of High-speed Subway Pneumatic Load on Platform Screen Doors
Research purposes:With the rapid expansion of cities and the formation of urban agglomerations,many cities have constructed or are about to begin constructing high-speed subway projects with design speeds over 100 km/h.The aerodynamic effect of high-speed subway trains can generate pulsating wind pressure on the trackside equipment and facilities,and the pulsating wind pressure acting on the platform screen door can affect the opening and closing and reliability of the platform screen door.This paper used a three-dimensional numerical calculation method to analyze the effects of train speed,piston air shaft opening and closing,and the presence or absence of train blockage on pressure waves in the track area and aerodynamic loads on screen doors during high-speed subway overtaking.Research conclusions:(1)The switch of the piston air well has an impact on the pressure wave changes,and the extreme values of the pressure wave changes within 1 s and 3 s with the piston air well opened are greater than that with the piston air well closed.(2)Compared with the three influencing factors of train running speed,piston air shaft switch,and whether there is train blockage in the station,the train running speed has the greatest impact on the pressure value inside the tunnel and the aerodynamic load of the screen door.(3)When the train speed is 100 km/h,the maximum wind pressure that the screen door can withstand is 1.042 kPa.When the train speed is 140 km/h,the maximum wind pressure that the screen door can withstand is 1.486 kPa.(4)The pressure wave characteristics and their impact on the aerodynamic load of screen doors during high-speed subway overtaking proposed in the paper provide a reference basis for effective prevention and control measures in similar projects in the future.
high speed subwaypressure wavescreen doorsaerodynamic load
NETL
NSTL
万方数据
