Study On The Parameters Of Plane Circle Curve Of Passenger And Freight Express Railway Line Based On Dynamic Analysis

The fast freight transportation of high value-added goods is a major trend in today's railway freight transportation.The fast freight transportation with social and economic benefits produced by its good timeliness,low cost,strong adaptability and short return cycle takes enormous advantage for the railway transportation.In the region of developed economy and goods of high density,the fast freight transportation is developing rapidly.At present,the situation is that the attendance rate of part high speed railway and passenger dedicated line is very low,and passenger dedicated line is generally running during the day,letting line capacity lie idle in the night.Running freight trains with small groups,high density and celerity can make full use of this part of the idle capacity.The fast freight train has the characteristics of heavy load and fast speed.Due to the lack of understanding of the dynamic interaction between the vehicle and the line,it is impossible to accurately grasp the dynamic performance of the vehicle-line.The development of the vehicle-line coupling dynamics provides a theoretical basis and method for the study of the influence of the passenger and freight express railway line parameters on the vehicle-line system.The parameters of the circular curve of the line not only affect the dynamic performance of the vehicle,but also have a significant impact on the project.The reasonable parameters of the planar curve will reduce the maintenance cost and the cost of the project.For the passenger and freight express railway,CRH2 trains,freight trains with the K6 bogie and the railway line with random irregularity are chosen as the basic condition of the simulation calculation.After the analysis,the range of the parameters of the planar circular curve is selected,the evaluation index system of the vehicle-line dynamic performance is established and the dynamic characteristics of vehicle-line under different circular curve parameters are simulated.The change rule of vehicle-line dynamic characteristics were explored by taking the train speed,the actual superelevation,the radius of the curve and the unbalanced superelevation as variables.The control factors that influence the value of circle curve parameters are determined.The range of the parameters of the circle curve of passenger and freight express railway is given.Based on the present situation,some suggestions were given.