Study Of Vehicle-Bridge Coupling Of The Multi-Line Railway Cable-Stayed Bridge

With the development of high-speed railway construction and the increase demand of traffic in our country, more and more multiline railway bridge appear in recent years. Therefore the simulation and calculation analysis of bridge-vehicle coupling vibration problem of multiple-line realway is necessary.In this paper,based on the vehicle-bridge coupling research of Baisha tuo bridge, the finite element model of baisha tuo bridge is established with structural analysis software ANSYS and The three-dimensional refinement models is established with multi-body dynamics software SIMPACK. the main research contents are as following:First of all, the multi-body dynamics theory and bridge structural dynamics theory are introduced, and the implementation method of bridge-vehicle space dynamic analysis has been analyzed and expounded on detail.Next, Based on the dynamic analysis model of baisha tuo bridge with finite element software ansys, the first 10 order vibration mode and corresponding natural frequency of vibration are calculated through the Calculation and analysis of natural vibration properties.Then, Space vibration response of the train (CRH3、CRH2) with 16 sections in line 1, line 2 and freight train in line 5 are calculated under different speed conditions. And the dynamic index of vehicle and bridge are assessed.Finally, the space vibration response of CRH3 train with 6 sections in three lines (line 1+line 2+line 3, line 1+line 2+ line 4) is calculated, The dynamics parameters of vehicle and bridge in three lines and in single line are compared and analyzed, and the rules are summarized.