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Wind and Structures
  Volume 30, Number 1, January 2020 , pages 037-54
DOI: https://doi.org/10.12989/was.2020.30.1.037
 


Experimental investigation of vortex-induced aeroelastic effects on a square cylinder in uniform flow
Dongmei Huang, Teng Wu and Shiqing He

 
Abstract
    To investigate the motion-induced aeroelastic effects (or aerodynamic feedback effects) on a square cylinder in uniform flow, a series of wind tunnel tests involving the pressure measurement of a rigid model (RM) and simultaneous measurement of the pressure and vibration of an aeroelastic model (AM) have been systematically carried out. More specifically, the aerodynamic feedback effects on the structural responses, on the mean and root-mean-square wind pressures, on the power spectra and coherence functions of wind pressures at selected locations, and on the aerodynamic forces were investigated. The results indicated the vibration in the lock-in range made the shedding vortex more coherent and better organized, and hence presented unfavorable wind-induced effects on the structure. Whereas the vibration in the non-lock-in range generally showed insignificant effects on the flow structures surrounding the square cylinder.
 
Key Words
    vortex-induced vibration; rigid model test; aeroelastic model test; square cylinder
 
Address
Dongmei Huang and Shiqing He: School of Civil Engineering, Central South University, Changsha, Hunan 410075, China

Teng Wu: Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY 14260, USA
 

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