Steady-Suction-Based Flow Control of Flutter of Long-Span Bridge
Source abstract
Abstract
The present wind tunnel study focuses on the effects of the steady-suction-based flow control method on the flutter performance of a 2DOF bridge deck section model. The suction applied to the bridge model was released from slots located at the girder bottom. The suction rates of all slots along the span were equal and constant. A series of test cases with different combinations of suction slot positions, suction intervals, and suction rates were studied in detail for the bridge deck model. The experimental results showed that the steady-suction-based flow control method could improve the flutter characteristics of the bridge deck with a maximal increase in the critical flutter speed of up to 10.5%. In addition, the flutter derivatives (FDs) of the bridge deck with or without control were compared to investigate the fundamental mechanisms of the steady-suction-based control method. According to the results, installing a suction control device helps to strengthen aerodynamic damping, which is the primary cause for enhanced flutter performance of bridge decks.
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Research context
OpenAlex topics: Fluid Dynamics and Vibration Analysis · Vibration Control and Rheological Fluids · Aerodynamics and Fluid Dynamics Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
School of Civil Engineering, Northeast Forestry University, Harbin 150040, China
Hunan Provincial Key Lab for Wind Engineering & Bridge Engineering, Hunan University, Changsha 410082, China
Funding
National Natural Science Foundation of China
References (24)
Show source-provided references
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