摘要
基于三维、非定常、可压缩流动的雷诺平均N-S方程和SST k-ω湍流模型,采用重叠网格技术,研究在250 km/h、350 km/h、400 km/h等速交会下线间距(4.6 m、4.8 m以及5.0 m)对隧道内交会压力波的影响。鉴于交会压力波的危害,从车体压力最值、车体两侧压差、"头尾波"现象三方面来进行阐述。研究结果表明:车体两侧压差时间历程曲线形状和明线交会压力波时间历程曲线形状相似,在通过列车的车头和车尾经过监控点时,压差值分别产生先正后负和先负后正的脉冲波,车尾通过时产生的压差明显比车头经过时低;"头波"幅值大约为"尾波"幅值的两倍;车厢交会侧监控点的最大正压值、最大负压值、最大压力峰峰值、车体两侧压差幅值和"头尾波"幅值均与线间距成负指数关系。
Based on 3-D, unsteady and compressible flow Reynolds-averaged N-S equations and SST k-ω turbulence model, adopting the overlapping grid technique, effects of 3 line spacings of 4.6 m, 4.8 m and 5.0 m on crossing pressure wave during 2 high-speed trains meeting in a tunnel at speeds of 250 km/h, 350 km/h and 400 km/h were studied. In view of the harm of intersection pressure wave, the effects were presented from three aspects including the maximum pressure value of car body, the pressure difference on both sides of car body and the phenomenon of "head-tail wave". Results showed that the time history curve shape of the pressure difference on both sides of car body is similar to that of crossing pressure wave in open line;when the head and tail of the met train passing the measurement points, the pressure difference produces firstly positive and then negative pulses and firstly negative and then positive pulses, respectively, the pressure difference generated by the train tail passing is obviously lower than that by the train head passing;the amplitude of the head wave is about two times of that of the tail wave;the maximum positive pressure, the maximum negative pressure, the maximum pressure peak value, the amplitude of pressure difference on both sides of car body and the amplitude of "head and tail wave" have a negative exponential relationship with line spacing.
作者
胡啸
孔繁冰
梁永廷
于淼
段修平
梅元贵
HU Xiao;KONG Fanbing;LIANG Yongting;YU Miao;DUAN Xiuping;MEI Yuangui(Gansu Provincial Engineering Lab of Rail Transit Mechanics Application,Lanzhou Jiaotong University,Lanzhou 730070,China;CRRC Tangshan Railway Vehicles Co.,Ltd.,Tangshan 063035,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第21期79-88,共10页
Journal of Vibration and Shock
基金
中国铁路总公司系统性重大项目(P2018J003)
国家重点研发计划任务(2017YBF1201304-15)。
关键词
高速列车
隧道
交会压力波
线间距
重叠网格法
high-speed train
tunnel
crossing pressure wave
line spacing
overlapping grid technique
