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| Influence of static wind additive attack angle of flutter performance |
| OUYANG Ke-jian1，CHEN Zheng-qing2 |
| 1.State Grid Hunan Electric Power Corporation Research Institute,Changsha 410007,China；2.Wind Engineering Research Center, Hunan University, Changsha 410082,China |
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Abstract Aerodynamic derivatives of Dongting Lake Bridge Girder Sections were identified by forced vibration in wind tunnel, and the angle of attack changes in steps of 1 ° from -3 ° to +4 °. the aerodynamic derivatives were fitted to three-dimensional surface by reduced velocity,angle of attack. Just to obtain a specific value of the effective angle of attack, all aerodynamic derivatives can be automatically obtained by the value of each angle of attack. aerodynamic derivatives were stored by three-dimensional TABLE in ANSYS, The effect of additional angle of attack to flutter stability were automatically included. Full-mode flutter analysis indicated that the additional angle of attack effect reducing typical bridge critical flutter speed, influence extent due to the different type of bridge.
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Received: 01 November 2013
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2015, Vol. 34 
