Influence of static wind additive attack angle of flutter performance

OUYANG Ke-jian;CHEN Zheng-qing

Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (2) : 45-49.

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PDF(2780 KB)
Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (2) : 45-49.

Influence of static wind additive attack angle of flutter performance

  • OUYANG Ke-jian1,CHEN Zheng-qing2
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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.

Key words

long-span bridge / flutter / additive attack angle / forced vibration / ANSYS

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OUYANG Ke-jian;CHEN Zheng-qing. Influence of static wind additive attack angle of flutter performance[J]. Journal of Vibration and Shock, 2015, 34(2): 45-49
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