Wind and Structures

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Aeroelastic forces on yawed circular cylinders: quasi-steady modeling and aerodynamic instability

  • Carassale, Luigi (Dipartimento di Ingegneria Strutturale e Geotecnica, University of Genova) ;
  • Freda, Andrea (Dipartimento di Ingegneria Strutturale e Geotecnica, University of Genova) ;
  • Piccardo, Giuseppe (Dipartimento di Ingegneria Strutturale e Geotecnica, University of Genova)
  • Received : 2005.08.04
  • Accepted : 2005.05.05
  • Published : 2005.10.25
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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.

Keywords

References

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