Simulation Research On Dynamic Property Of High Speed Train-Ballastless Track-Bridge Coupled System

A dynamic model of high speed vehicle- ballastless track-bridge coupled system, which is about slab track and sleep buried ballastless track, is built on the principle of vehicle bridge interaction, concerning the situation of application and popularization of ballastless track in the field of railway bridge, a large scale dynamic analysis software-MSC/Dytran is adopted to analyze the dynamic property of the system. In addition, considering most simulation research on the vehicle bridge is about straight line bridge, the paper further studies the dynamic property of high speed vehicle- track-curved bridge coupled system. During the study, train type, train moving velocity, curve radius and superelevation on curve and other factors which affect dynamic property of the system, are considered in the course of simulation. The paper analyzes the dissimilarity of the dynamic property of the system under the condition of various track structure. In the view of the specialty of ballastless track curved bridge that superelevation on curve couldn't be adjusted after construction, the paper probes into the question that how train velocity promoting influence dynamic property of the system, and estimates reasonable rigidity coefficient value of rubber tie plate below slab in terms of requirement of passenger's riding comfortableness, vibration attenuation and noise reduction. My research in the paper aims at providing theoretical reference to designing and construction of ballastless track bridge in our country.