Abstract
Flutter of suspension bridge is an aerodynamic instability phenomenon that occurs due to interactions between wind and structural vibration, which is an issue in the wind-resistant design of long-span suspension bridges. Equations of motion for the flutter vibration of suspension bridges are established in time domain, and then these equations of motion are transformed into state space. By introducing the precise integration method, flutter equations are solved in time domain, the critical flutter velocity and displacement time history of suspension bridge are obtained. Finally, the method presented in this paper is verified using a numerical example, the analytical results were compared with the wind tunnel test, it showed that the flutter analysis results are in good agreement with the results of wind-tunnel test. Compared to conventional flutter analysis in frequency domain, the advantage of the method presented in this paper is that there is only one variable of wind speed in flutter analysis in time domain.
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