Dynamic Analysis of the Relationship between Track Stiffness and Rail Lateral Displacement

With the increasing of train velocity, higher safety and stability for running is required. The track lateral vibration is one of the key point to affect the train running in safety and stability. This paper adopts a coupling model of lateral vehicle-track systems, by means of finite element simulation calculation program, separately analyses the lateral vibration performance on different track stiffness with various passenger-train running speeds. With the calculation result, and contrasted with the field testing data, the influence of the rail lateral displacement on the passenger-train running in stability and safety is analyzed and investigated. In conclusion, in order to improve the quality of the speed-up train running, the track irregularity, the magnitude and uniformity the vertical and lateral stiffness of track should be effectively controlled.