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Wind and Structures Volume 8, Number 5, September 2005, pages 373-388 DOI: http://dx.doi.org/10.12989/was.2005.8.5.373 |
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Aeroelastic forces on yawed circular cylinders: quasi-steady modeling and aerodynamic instability |
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Luigi Carassale, Andrea Freda and Giuseppe Piccardo
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| Abstract | ||
| Quasi-steady approaches have been often adopted to model wind forces on moving cylinders in cross-flow and to study instability conditions of rigid cylinders supported by visco-elastic devices. Recently, much attention has been devoted to the experimental study of inclined and/or yawed circular cylinders detecting dynamical phenomena such as galloping-like instability, but, at the present state-of-the-art, no mathematical model is able to recognize or predict satisfactorily this behaviour. The present paper presents a generalization of the quasi-steady approach for the definition of the flow-induced forces on yawed and inclined circular cylinders. The proposed model is able to replicate experimental behaviour and to predict the galloping instability observed during a series of recent wind-tunnel tests. | ||
| Key Words | ||
| quasi-steady modeling; aerodynamic instability; yawed cylinders; galloping. | ||
| Address | ||
| Dipartimento di Ingegneria Strutturale e Geotecnica, University of Genova, Via Montallegro 1, 16145 Genova, Italy | ||