Research On Vibration Reduction Of Ladder Track In Subway Tunnel

With its security, economics and efficiency, Urban Rail Transit has done well in solving the problem of urban congestion, but the problems caused by vibration and noise have a negative affect on the surrounding environment in different levels. Therefore, vibration and noise reduction in subway has been attracting more and more people's concerns. In order to solve the problems caused by vibration and noise in Urban Rail Transit, this paper which focus on the ladder track structure in the tunnel of Beijing Subway Daxing Line, has studied the vibration reduction characteristics of the ladder track structure used in the tunnel through refering to previous studies and establishing the relevant finite element models by using ABAQUS software. The following subjects are mainly discussed in the paper:1. Analysis modal and dynamic characteristic of the ladder track structure system in different parameters through establishing Vehicle-Track-Tunnel dynamic simulated model, and study the rules due to the changes of different parameters.2. Analysis the variation of vibration on ground surface under different velocities through establishing Tunnel-Soil 2D model.3. Propose the optimizational advices of ladder track structure through combining research findings and previous research results.