南京大胜关长江大桥地铁列车运行气动性能研究  

Aerodynamic Performance of Metro Train Operation on Nanjing Dashengguan Yangtze River Bridge

作　　者：汪皓 司天文[2] 郑史雄[2] 马舜 周云强 WANG Hao;SI Tianwen;ZHENG Shixiong;MA Shun;ZHOU Yunqiang(China Railway Urban Planning&Design Institute Co.,Ltd.,241000,Wuhu,China;不详)

机构地区：[1]中铁城市规划设计研究院有限公司,芜湖241000 [2]西南交通大学土木工程学院,成都610031 [3]中铁大桥勘测设计院集团有限公司,南京210031

出　　处：《城市轨道交通研究》2023年第5期182-188,197,共8页Urban Mass Transit

摘　　要：以南京大胜关长江大桥地铁搭载段为研究背景,通过风洞试验,探究不同风攻角、列车位置及附属设施状态下地铁列车气动力系数变化规律,进而揭示地铁列车气动特性对列车运行稳定性影响的规律。研究结果表明:风攻角对双线在轨列车稳定性影响更大;当桥梁无附属设施,风攻角的增大不利于迎风侧列车稳定性,双线在轨列车比单线在轨列车更稳定;当桥梁有附属设施,且列车位于边跨时,风攻角越大迎风侧列车越稳定,而背风侧列车则相反,当列车在中跨运行时,列车侧向力及侧向倾覆力矩系数大于边跨,而升力系数小于边跨,表明桥梁桁架改善了列车的抗倾覆性能;桥上增加附属设施后,列车的侧向力及侧向倾覆力矩系数降低,表明附属设施有一定的格挡作用。Taking the metro carrying section of Nanjing Dashengguan Yangtze River Bridge as research background,through wind tunnel tests,the variation law of metro train aerodynamic coefficients under different conditions of wind attack angles,train positions and ancillary facilities is investigated,and the influence law of metro train aerodynamic characteristics on train operation stability is revealed.Research results show that the wind attack angle has a bigger impact on the stability of double-track on-rail train;when there are no auxiliary facility on the bridge,increasing wind attack angle undermines the stability of windward side train,and double-track on-rail train is more stable than single-track on-rail train;when the bridge has auxiliary facilities and the train is positioned in the side span,the windward side train becomes more stable as the wind attack angle increases,whilst the leeward side train does the opposite;when the train travels in the center span,the lateral force and lateral overturning moment coefficient are greater than when the train is in the side span,yet the lift coefficient is lower,showing that the bridge truss improves the train anti-overturning performance;the lateral force and lateral overturning moment coefficient of the train are lowered after placing auxiliary facilities on the bridge,demonstrating that the auxiliary facilities have some level of grillage effect.

关 键 词：南京大胜关长江大桥 地铁列车 横风作用 风洞试验 气动性能 

分 类 号：U270.11[机械工程—车辆工程]