Research On Vibration Reduction Of Floating Slab Track In Metro Viaduct

ABSTRACT:With its elevated security, economics and efficiency, Metro Rail Transit on bridge has done well in solving the problem of urban congestion, but the environmental problems such as vibration and noise are also attracting more and more people's concern, which affects the daily lives of everyone to some extent. In order to solve the problem of vibration and noise about urban rail traffic on bridge, this paper focuses on the floating slab track with better damping performance. On the basis of previous achievements of relevant researches, taking the floating slab track on bridge of the Beijing subway Thirteen, the dynamic finite element models of the floating slab track structure of stell-spring on bridge are established by using ABAQUS software. This paper mainly analyzes the modal characteristics about the structure of floating slab track and the vibration characteristics when the train is moving, and considering the impact of different parameters, and summarizes the vibration and noise reduction measures about Metro Rail Transit on bridge.Through simulation analysis, this paper studies the autooscillation characteristics of the floating slab track structure on bridge, and have got the top ten natural frequencies of the system; under the condition of vertical profile irregularity of the sixth grade track, this paper studies the system vibration characteristics of the floating slab track structure on bridge from both the track and bridge, discusses the influence disciplines about the vibration characteristics which part of the track and bridge structure parameters work on the steel spring floating slab track, and at last summarizes the measures on reduction of noise and vibration of Metro Rail Transit on bridge.