摘要
针对高速列车在时速400 km运行时表面压力急剧增加的问题,研究了通过隧道时列车表面压力变化和动态密封指数对车内压力变化的影响。建立了8辆编组列车隧道通过的数值仿真计算模型,确定了计算区域和边界条件,分析了列车表面压力波动,进行了车内压力变化与气密性评估。分析结果表明:高速列车以400 km/h通过净空截面积为100 m2隧道时,车体侧窗最大负压约为-4 951 Pa,列车动态气密性指数最小限值为8.85。
In view of the problem that the surface pressure of high-speed train increases sharply when it runs at 400 km/h,the influence of train surface pressure change and dynamic sealing index on the pressure change in the train interior when passing through the tunnel is studied.The numerical simulation calculation model of eight-car train tunnel is established to determine the calculation area and boundary conditions,analyze the pressure fluctuation on the train surface,and evaluate the pressure change and air tightness in the train.The results show that when the high-speed train passes through the tunnel with a clearance section of 100 m 2 at 400 km/h,the maximum negative pressure of the side window of the car body is about-4951 Pa,the minimum limit of the dynamic air tightness index of the train is 8.85.
作者
杨阳
张茂帆
余浩伟
姜梅
杨九河
YANG Yang;ZHANG Mao-fan;YU Hao-wei;JIANG Mei;YANG Jiu-he(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;China Railway Chengdu Bureau Group Co.,Ltd.,Chengdu 610031,China)
出处
《机械工程与自动化》
2023年第5期22-23,27,共3页
Mechanical Engineering & Automation
基金
国铁集团科技研发项目(P2021J003)。
关键词
高速列车
压力变化
气密性
high-speed train
pressure change
air tightness
