Analysis for the vibration reduction characteristics of steel spring floating slab tracks under different types of excitation

To investigate the vibration reduction characteristics of steel spring floating slab tracks (FSTs) under different types of excitation, a two-dimensional train-track coupling dynamic finite element model was established, and two kinds of track types of monolithic track and spring steel floating slab track were considered. The impact load, the moving constant load and the train load were used to study the vibration responses of the track structure in terms of insert loss. The results indicated that:1) Compared with the moving constant load, the impact load overestimated the vibration reduction characteristics of FSTs; 2) Compared with the moving single vehicle, the vibration reduction characteristics of FSTs was underestimated below FST natural frequency under the impact load and was overestimated between 125 Hz and 400 Hz.