Experimental study on wind pressure characteristics of metro platform screen doors under variable conditions

 Aiming at the wind pressure problem of the platform screen door, by changing the eight operating conditions of the mechanical air supply and exhaust system in the public area of the station, the upper and lower heat exhaust systems in the track area, and the ventilation system of the piston air shaft, the wind pressure of the platform screen door under normal train operation is tested. The results show that under the variable conditions of the mechanical air supply and exhaust system in the public area of the station, the maximum difference of wind pressure experienced by the platform screen doors in different positions at the same time is nearly 50%, which cannot be used as an effective means to control the wind pressure of the platform screen door. Under the variable conditions of the upper and lower heat exhaust systems in the track area, opening the upper heat exhaust system can reduce the maximum positive pressure value of the middle platform screen door, but the effect is not good for both sides of the platform screen door, so the upper heat exhaust system in the track area cannot be used as an effective means to control the wind pressure of the platform screen door. Under the variable conditions of the connecting air valve of the double-piston air shaft, opening the connecting air valve can effectively reduce the wind pressure value of the platform screen door, the peak value of positive pressure can be reduced by 88.3%, and the peak value of negative pressure can be reduced by 50%.