摘要
Abstract
Four typical metro stations in hot summer and warm winter areas are selected,and high-precision micro-differential pressure sensors are used to continuously collect the infiltration wind pressure on both sides of the platform screen doors during the operation period.Taking the second pressure extreme value during the station entry process as the benchmark,the effective data segment is intercepted to establish a dynamic time axis calibration to eliminate the train arrival dispersion,eliminate the sudden acceleration change,and introduce a bimodal Gaussian function to fit the pressure waveforms at the station entry and exit,thereby achieving the quantitative representation of the wind pressure of the platform screen door penetration.The results show that the track area of the train entering the station is higher than the platform level,forming a positive pressure peak,while leaving the station forms a negative pressure trough.The platform screen door at the rear of the train has a larger peak when the train enters the station and a smaller trough when it leaves.The pressure difference increase between adjacent gates in the non-peak area is 0 Pa to 5 Pa,and in the peak area it is 5 Pa to 25 Pa.The gradient statistics are obvious.During peak hours,the intervals between trains are compressed,and the disturbance of the following vehicles causes the pressure difference at the station to increase,but the difference is limited.When leaving the station,due to insufficient negative pressure recovery,the suction force weakens,and the absolute value of the pressure difference drops by 50%.The volume and type of the station are the key factors influencing the pressure difference fluctuation of the exhaust system.In a standard station with relatively small space,the pressure difference fluctuation range is reduced by 30.05%.关键词
地下车站/屏蔽门/渗透风/压力波动/高斯拟合Key words
underground station/platform screen door/infiltration wind/pressure fluctuation/Gaussian fitting分类
交通工程
