运行中地铁列车的车内外压力变化特性研究

通过对我国某型地铁列车进行隧道空气动力学实车线路试验,得到地铁列车实际运行过程中车内、外压力变化规律。试验结果表明:该型地铁列车车内压力变化满足我国地铁设计规范舒适度评价标准及美国地铁人体舒适度评价标准。地铁列车运行过程中,最长隧道区间的车内、外压力变化幅值明显大于其它隧道;列车以不同速度和模式运行中,车内1.0 s、1.7 s、3.0 s时的压力变化幅值和车外各测点压力变化幅值均不相同,车体表面测点压力变化由车头至车尾方向呈逐渐减小的趋势。

Variation Characteristics of Metro Vehicle Internal and External Pressures during Operation

Through the aerodynamics test in tunnel on a China manufactured metro model,a series of data on metro vehicle internal and external pressures during actual operation process are obtained.The experiment results demonstrate that the internal pressure changes can meet the human body amenity standards both of Chinese metro vehicle design and American metro industry.In actual operation,the variation amplitude of internal and external pressures in the longest tunnel is distinctly greater than that in other tunnels.And what's more,the internal pressure amplitude and the amplitudes of each external measured point at 1.0 s,1.7 s and 3 s are all different and vary with different running velocities and operation modes.To be specific,the pressure amplitudes at the measured points of external surface gradually reduce from the head to the trail along the vehicle.