Numerical Simulation Of Roof Passing By High Speed Railway Train And Vibration Analysis

The train induced wind may have certain pressure to the two sides of the line when the train cross the station. Based on the numerical simulation and field test, do research with the train induced wind when the train through the bridge and the canopy.With the increasing of train speed, train aerodynamics must be studied above all. With the increasing of speed, interaction between train and air fluctuates violently, and thus have influence to the safety of the train running, personnel along the line and buildings around.Based on the theory of computational fluid dynamic, with the help of computational fluid dynamic software Fluent, combined with actual project, numerical simulation is carried out to investigate the response of construction under railway aerodynamic.Based on the3-D steady and RANS equation and standard k-ε turbulence model, using moving-grid to simulate the pressure when the train cross the flyover and canopy with the speed250km/h、300km/h、350km/h and use the field measure data to verify the numerical results. Analyzing the wind pressure distributions and changes of flyover and canopy when the train cross and the peak pressure along the longitudinal and vertical distribution; Analyzing the relationship between the pressure and train speed. Research results show that, when the train cross the bridge and canopy will produce strong pressure, the amplitude of pressure is proportional to the square of the train speed.Beside, this paper contain the vibration analysis of the bridge and canopy induced by the train induced wind; The response induced by the wind and train induced vibration. Research results show that, the structure can produce severe vibration with the improve of the train speed; Earthquake play a leading role to the vibration.