Advance in Coupling Vibration of Wind-Vehicle-Bridge Systems

Abstract

Lateral wind is one of the most important influencing factors on train running performance. In process of high speed train running along the flexible bridge under lateral wind, there is the interaction among wind, vehicle, and bridge, which represents the coupling vibration of wind-vehicle-bridge system. There was some existing research was reviewed, the latest advance in the field of wind-vehicle-bridge system is presented. Firstly, aerodynamic characteristics, A new test rig with moving vehicle model is developed in a large wind tunnel to respectively measure the aerodynamic force on bridge deck and vehicles while vehicles are running along the bridge deck under cross wind. The effects of vehicle speed, rail position of vehicle on the aerodynamic characteristics of vehicle and bridge are studied. The sudden change of vehicle aerodynamic forces are measured by wind tunnel test when vehicle is passing through the bridge tower and two vehicles are passing each other. Aerodynamic coefficients of CRH2 are also measured in wind tunnel. In addition, train induced wind is simulated by CFD. Second, coupling and failure mechanism, with engineering examples, many parameter studies are carried out to explore coupling mechanism of wind-vehicle-bridge system, including wind field, stiffness of bridge, vibration of bridge, the effect of sudden change of wind load and so on. The control factors in wind-vehicle-bridge system are analyzed for different bridge types. Meanwhile, the above-mentioned research findings and conclusions have been applied in Anqing Yangtze River Bridge, Hanjiatuo Yangtze River Bridge, Tongling Yangtze River Bridge, Shanghai Yangtze River Bridge, etc.