Simulation of Train-Bridge Coupling Vibrations in a Hybrid Cable-Stayed Suspension System under Combined Wind and Wave Actions
This paper presents the numerical simulation research of the train-bridge coupling vibrations in the offshore hybrid cable-stayed suspension bridge under the combined wind and wave actions.A finite element model of a rail-cum-road bridge of a hybrid cable-stayed suspension system was established in ANSYS,and a dynamic model of CRH3 train was developed in SIMPACK,to simulate the aerodynamic loads of the train-bridge coupling system at different wind and train speeds.Based on the regular wave loads on the composite foundations of the bridge calculated by FLOW-3D,a wind-wave-train coupling model was built up,to analyze the influence of wave heights,wind and train speeds on the train-bridge interactions.The results show that in the wind-wave-train-bridge coupling system,the dynamic property indicators of the train increase as the wave heights become bigger.As the wind speed increases,the midspan transverse displacements of the bridge get bigger,while the vertical displacements have almost no change.The dynamic property indicators of the train are in positive proportion to the train speeds,while the midspan transverse displacements and acceleration do not pace with the variation of train speed,the vertical displacements and acceleration significantly increase along with the increase of train speed.
hybrid cable-stayed suspension bridgerail-cum-road bridgesea-crossing bridgecombined wind and wave actiontrain-bridge coupling actionoverset mesh technologyaerodynamic loadfinite element method
万方数据
维普
