【摘要】 本文采用CFD方法对地铁通过公铁合建越江隧道产生的压力波进行了数值模拟分析。基于国内某公铁合建越江隧道相关尺寸建立其下部地铁隧道三维几何模型,采用动网格方法模拟列车从驶入到驶出隧道的全过程。利用国外模型实验数据验证了本文数值模拟方法的可靠性,根据隧道内压力变化曲线,分析了由于列车通过隧道引起的压力变化规律。计算得到进入疏散通道防火门处的压力峰值,最大值1910Pa,最小值-1060Pa,与疏散通道内30~50Pa的正压有较大的压力差。更多还原

【Abstract】 A numerical simulation on pressure waves generated by a train travelling through a road and subway combined tunnel was carried out by means of the Computational Fluid Dynamics(CFD)method. The three-dimensional model of subway was establishedbased on an under construction tunnel in China. Dynamic mesh method was applied to simulate the process of a train entering and running through the tunnel. The numerical simulation method was validated against a scaled model experiment. The pressure change induced by a train travelling through the tunnel was analyzed according to the pressure curve. Peak pressure at the fire door where to enter the fire evacuation routes was calculated.The maximum(1910Pa) and the minimum(-1060Pa) pressure could be dozens of times larger than that(30~50Pa) in the evacuation routes.更多还原