Research On The Dynamics Of Non-stop Passenger Trains Based On Parallel Mode

With the increase of train speed,travel time is constantly reduced.However,many railways have long mileages and lots of stations because of the growing city density.The proportion of time occupied by train parking,deceleration and the acceleration constantly increases,so time benefit is getting more and more affected.Shortening travel time simply by improving speed becomes limited.If passengers could get on and off trains in the condition of no parking,running time of train operation would be greatly shortened and the economic benefit of transportation would be improved.Based on above objectives,this project carries out a study on the design that passengers get on/of without trains stopping to improve the efficiency of train operation.Trains of transit track and main track will run in parallel railway.The trains will compress air and the air will orbit between trains in the same time,which,bring airs forces on tains,affects the safety of the train operation.Running speed,railway spacing and ratio of channel occupation are the main factors that affects aerodynamic loads.So this paper will analyze the influence of the factors to the aerodynamic load of parrallel trains and safety of train operation.The details are as follows:(1)Based on this design,this paper takes the CRH3 as the prototype and uses the drawing software Pro/E to establish the parallel high-speed train model;the Fluent to establish aerodynamics calculation model.this thesis calculates the aerodynamic loads of high speed trains under different running speeds,different line spcing of the rails,different channel occupation ratio,then we analyses the impact of running speeds,different line spcing of the rails,different channel occupation ratio on the aerodynamic loads.(2)In order to study the running safety of high-speed trains under parallel,this thesis uses the multi-body system dynamic simulation software to establish a multi-body system dynamic model,on which the aerodynamic loads are deal with as external loads to study the influence of the running safety of high speed trains uder parallel.With this model,this thesis simulates the influence of high speed trains under different running speeds,line spacing of the rails and channel occupation ratio,and calculates the safety indexes of the coefficient of derailment,rate of wheel load reduction,lateral force of wheel axle and vertical force of wheeltrack.Through the above simulation,and analyses the results of the calculation,This paper provides reference to the safe operation of high-speed trains under parallel.