Theory And Simulation Analysis And Test Research On Floating Slab Track

The vibration in urban rail transit system is increasing brought into focus in recent twenty years.This thesis describes some means and measures of controlling vibration and noise of the urban rail transit in the world. Emphasis is laid on floating slab track which is a mass-spring vibration isolation system and the best vibration-decreasing measure in rail transit system.In order to understand the key parameter, which influence the vibration isolation efficiency of floating slab track and provide theoretical support for simulation, we analyze the vibration isolation principle of floating slab track.Coupling dynamics of vehicle-rail-floating slab-foundation system is calculated using the general software-ANSYS. The dynamic performances of the floating slab and the efficiencies of the vibration isolation are analyzed in detail.A model experiment is made on an actual floating slab track, and the vibration transfer property of this track under three different frequencies of impact load is mainly tested.Vibration test is applied to floating slab track and fixed track that has been used in sites. The results approve the vibration reduction effect of the former and preliminarily verify the correctness of computer simulation.