摘要
利用三维、可压缩、非定常的N-S方程和k-ε双方程湍流模型,采用有限体积法对两单线隧道之间的横通道缓解隧道内瞬变压力的影响进行了数值模拟,得到了当高速列车通过有无横通道的隧道时隧道壁面及车体表面测点的瞬变压力时间历程及其变化幅值。计算结果表明:(1)设置横通道可以有效缓解高速列车通过隧道时引起的瞬变压力;对于靠近横通道位置处的隧道壁面测点,横通道的设置可以使其压力变化幅值降低37%左右,同时可使车体表面测点的瞬变压力幅值降低30%多;(2)相同截面面积、不同截面形状的横通道,缓解效果基本相同;(3)针对参数确定的隧道,存在最佳横通道截面积值,使其缓解隧道内瞬变压力的效果最佳。
Effect of transient pressure on tunnel from the cross passage was simulated numerically, based on unsteady N - S equation of three dimensional and compressible viscous fluid and k -ε turbulence model, and time - history and amplitude of transient pressure for measuring points on the surface of tunnel and car body were obtained when a high -speed train past the tunnel with and without the cross passage. The research shows that, （ 1 ） the cross passage can effectively release the pressure amplitude, and the value of pressure amplitude of the point on the tunnel near the transverse passage -way can be decreased about 37%. Still, that for the train will be declined by over 30%. （2） eatabatic impact on the transient pressure is almost identical at different shape and same cross - section area of transverse passage - way. （3） The alleviating efficiency on the transient pressure can be optimal with the appropriate cross - section area of cross passage for one tunnel.
出处
《铁道科学与工程学报》
CAS
CSCD
2010年第4期37-41,共5页
Journal of Railway Science and Engineering
基金
铁道部武广客运专线隧道空气动力效应研究资助项目(2005K002-D(G)-2)
关键词
横通道
瞬变压力
隧道
数值模拟
cross passage
transient pressure
tunnel
numerical simulation
