The Study Of The Vibration Property Of Ballastless Track Of Urban Mass Transit On Bridge

Urban mass transit on bridge has done well in solving the problem of urban traffic jam with itself advantages, but other negative factors, such as noise, vibration, are also attracting more and more people's concern. In order to reduce the vibration situation of urban mass transit on bridge and the impact on the surrounding, in this article, according to practice situation, establish the factual 3D model of track-bridge-roadbed, use mobile loads simulating the state of trains running, and observe different effect on track vibration on bridge because of the various parameters of speed, bridge and track structure. At the same time, establish 3D modal of railbed-bridge transition section, simulate the train running from bridge to railbed, and observe the effect on vibration property of transition section owing to stiffness,length and speed changes of transition section.There are some key factors having been found which are useful of reducing the vibration situation of urban mass transit on bridge through the simulation; further analysis of how it impacting track on bridge and surrounding environment; in the limited circumstances, some parameters of track and bridge structure will be advised for future work on 3D simulation of urban mass transit on bridge.