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