Abstract： The processes of CRH380A high-speed train entering a tunnel were completed through numerical method. The governing equations were the threedimensional, compressible, unsteady N-S (Navier-Stokes) equations. The finite volume method(FVM) was used to discretize the computational domain, and the sliding mesh method(SMM) was used to simulate relative movement of the train and its surroundings. The calculation results of transient pressure changes were basically consistent with the field measurement in China. The results show that the transient pressure change process can be divided into three phases: the pressure increases caused by the initial compression wave, the pressure increases caused by air friction, and the pressure drops caused by the headway passing. The maximum positive and negative pressures appear in different positions in longitudinal direction and the same cross section of the tunnel, and the aerodynamic pressure in the entrance and the tunnel shows significant three-dimensional effects. When the train enters eccentrically, the air pressures near the tunnel are greater than the far side of tunnel, the train is influenced strongly by lateral aerodynamics.
王磊 骆建军 高立平 李飞龙 李泽瑞. 时速350km高速列车进隧道过程#br#
中瞬变压力变化规律研究[J]. 土木工程学报, 2020, 53(S1): 252-257.
Wang Lei Luo Jianjun Gao Liping Li Feilong Li Zerui. The law of transient pressure in the process of #br#
350km/h high-speed train entering a tunnel. 土木工程学报, 2020, 53(S1): 252-257.
