Research and applications of air pressure pulse from trains passing each other

The asymmetrical slippage grid technique,the numerical computation,the moving model test,and the full-scale train test for air pressure pulse from trains passing each other are introduced.And the relations between the air pressure pulse and the train speed,the track interval,the car-body width,the boundary layer,the train shape,the train configuration are builded on the basis of the results of numerical computation,test and theoretical analysis about the speed-improving train,the 200 km/h train and the train above 200 km/h.The evaluating method about driving safety from trains passing each other is discussed.And the limit value of train body and its windows endured the transient load of pressure impact at two trains passing each other is obtained.