The Research on Dynamic Characteristics of Ballastless Track Slab on 32m Simple Box Girder

According to the fact that the ballastless track system study results often deviate from the actual value greatly using the method of simplified box girder in the high-speed railway at present. The new overall 3D models with simple box girder and ballastless track slab are built by using ANSYS software, and dynamic response results of ballastless track slab in the overall structure are analyzed at different speeds under high-speed railway loads. The results showed that dynamic response of ballastless track system showed a certain degree of periodicity, the maximum vertical displacement of ballastless track slab, mortar cushion and concrete base plate in the ballastless track system decreasing with the train speed increasing, and maximum acceleration increasing with the increase of train speed.