摘要
为提升磁浮列车通过隧道旅客乘坐的舒适性及安全性,需开展快速磁浮列车以不同速度隧道运行时气动力及车内变化规律研究。通过空气动力学数值模拟方式,模拟快速磁浮列车在单线隧道内压力传播特性,分别对不同运行速度下隧道壁面压力、列车表面压力及车内压力的变化情况进行分析。分析结果表明:随着速度增大,隧道壁面压力峰值和幅值均增大,且列车表面鼻尖位置的压力正峰值及幅值最大,仍然满足车体疲劳强度指标±4 KPa的要求;车体表面测点压力近似于列车运行速度的2.1~2.4次方正比关系;列车内部压力变化最大的位置为头车,当速度小于160 km/h时,密封指数超过5 s,司机室内瞬变压力小于0.8 KPa/3 s,满足人体舒适性要求;当速度达到180 km/h时,密封指数需超过7 s,司机室内部压力变化率小于0.8 KPa/3 s。
In order to improve the comfort and safety of passengers during the operation of maglev trains through tunnels,it is necessary to study the aerodynamic forces and changes in the car when the maglev train runs through the tunnel at different speeds.The aerodynamic numerical simulation method is used to simulate the pressure propagation characteristics of the fast maglev train in the single-line tunnel,and the pressure changes the tunnel wall,the train surface and the train interior are analyzed under different running speeds.Analysis results show that with the increase of speed,the peak and amplitude of the tunnel wall pressure increase.Meanwhile,the positive peak and amplitude of the nose tip position pressure on the train surface are the largest,but both are less than the requirement of±4 KPa of the fatigue strength index of the car-body.The car-body surface point's pressure is similar to the 2.1 to 2.4 power ratio of train running speed.In the condition of the train passing through the single-line tunnel,the position where the pressure change the most inside the train is the first car.When the speed is less than 160 km/h,the sealing index exceeds 5 s,and the change rate of air pressure in the cab is less than 0.8 KPa/3 s,which satisfies the human body comfort requirements;when the speed reaches 180 km/h,the sealing index needs to exceed 7 s,and the pressure change rate inside the is less than 0.8 KPa/3 s.
作者
王家恒
李丽
吴志会
高锋
吴定鼎
韩亮
WANG Jia-heng;LI-Li;WU Zhi-hui;GAO Feng;WU Ding-ding;HAN Liang(CRRC Zhuzhou Locomotive Co,Ltd,Zhuzhou 412001,China;Maglev traffic vehicle system integration of Hunan primary laboratory,Zhuzhou 412001,China;CRRC Zhuzhou Institute Co,Ltd,Zhuzhou 412001,China)
出处
《磁性材料及器件》
2025年第3期50-56,共7页
Journal of Magnetic Materials and Devices
基金
湖南省制造业关键产品“揭榜挂帅”项目(2024GXGG003)
湖南省创新生态建设计划研究(2024HNZD02)
中央引导地方科技发展资金项目(2024ZYC0013)。
关键词
快速磁浮列车
单线隧道运行
空气动力学性能
列车表面压力
压力变化率
fast maglev train
running in the single-line tunnel
aerodynamic performance
the surface pressure on the train
pressure change rate
