Migration Analysis of Periodic Layered Slab Track on Environment Vibration under Inter-City Train Running with Finite Element Method

With the rapid development of rail transit, developing more effective vibration and noise reduction methods has become a significant challenge. In the case of high-speed train operation, the traditional track vibration in underground railway is not suitable because the track must provide reliable support and achieve the vibration reduction effects at the same time. Therefore, the periodic structure of phononic crystal is introduced into the design of track slab, and the periodic layered track slab is proposed. In this study, the train-track-tunnel-foundation-building interaction model was established based on vehicle-track coupling dynamics theory and finite element method (FEM). The model is solved using the hybrid integral strategy. The calculation results show that after using the periodic layered track slab, the global vibration level of each position is significantly reduced in certain frequency ranges, and may has a slight increase in other certain frequency ranges.