Influence of Air Pressure Pulse on Side Windows of High-speed Trains Passing Each Other

Abstract

Air pressure pulse from high-speed trains passing each other will cause a big impact on train side windows,which could result in a broken window accident,thereby bringing about hidden danger to passengers and train running.Based on 3D,Reynolds average Navier-Stokes equations of viscous fluid and k-e two equations turbulent model,dynamic processes of high-speed trains passing each other in open air and in long tunnel at five different speeds(200 km/h,250 km/h,300 km/h,350 km/h and 400 km/h) are simulated and analyzed by using moving mesh finite volume method.Complete pressure pulse change profile on side windows is obtained.The calculation results show that there is a big difference between pressure pulses from trains passing each other in open air and in long tunnel.Minus pressure pulse peak acting on train side windows as the trains passing through each other in long tunnel is about two times that in open air.Therefore it is not correct to using the pressure pulse change tendency of trains passing through each other in open air to that in tunnel.Based on the results of calculation,reasons of side window broken from trains passing through each other and the method of assessment for side window strength are analyzed.When side windows of a high-speed train are designed,not only the strength of resistance to impact on window glass should be considered,but also assembling strength of the window glass must be considered.A glass window with long perimeter is favorable for resistance to impact of air pressure pulse when the windows aera equal.