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
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.
2015, Vol. 34 
