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Wind & structures v.8 no.5, 2005년, pp.373 - 388  

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  );
  • 초록

    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.


  • 주제어

    quasi-steady modeling .   aerodynamic instability .   yawed cylinders .   galloping.  

  • 참고문헌 (12)

    1. Schewe, G. (1983), "On the force fluctuations acting on a circular cylinder in crossflow from subcritical up to transcritical Reynolds numbers", J. Fluid Mech., 133, 265-285. 
    2. Schewe, G. (2001), "Reynolds-number effects in flow around more-or-less bluff bodies", J. Wind Eng. Ind. Aerodyn., 89, 1267-1289. 
    3. Strømmen, E. and Hjorth-Hansen, E. (1995), "The buffeting wind loading of structural members at an arbitrary attitude in the flow", J. Wind Eng. Ind. Aerodyn., 56, 267-290. 
    4. Larose, G.L., Jakobsen, J.B. and Savage, M.G. (2003), "Wind-tunnel experiments on an inclined and yawed stay cable model in the critical Reynolds number range", Proceedings of the Fifth Int. Symposium on Cable Dynamics, S. Margherita Ligure (Italy), September 2003, 279-286. 
    5. Luongo, A. and Piccardo, G. (2005), "Linear instability mechanisms for coupled translational galloping", J. Sound Vib., in press. 
    6. Macdonald, J.H.G. and Larose, G.L. (2004), "Quasi-steady analysis of dry inclined cable galloping in the critical Reynolds number range", Proceedings of WES2004, UK Wind Engineering Society, Cranfield (UK), September 2004. 
    7. Matsumoto, M., Shiraishi, N., Kitazawa, M., Knisely, C., Shirato, H., Kim, Y. and Tsujii, M. (1990), "Aerodynamic behavior of inclined circular cylinders - cable aerodynamics", J. Wind Eng. Ind. Aerodyn., 33, 63-72. 
    8. Saito, T., Matsumoto, M. and Kitazawa, M. (1994), "Rain-wind excitation of cables on cable-stayed Higashi- Kobe Bridge and cable vibration control", Proceedings of the Int. Conf. Cable-Stayed and Suspension Bridges, Deauville, October 1994, 2, 507-514. 
    9. Cheng, S., Larose, G.L., Savage, M.G. and Tanaka, H. (2003b), "Aerodynamic behaviour of an inclined circular cylinder", Wind and Struct., 6, 197-208. 
    10. Di Paola, M., Falsone, G. and Pirrotta, A. (1992), "Stochastic response analysis of nonlinear systems under Gaussian inputs", Probabilistic Engineering Mechanics, 7, 15-21. 
    11. Freda, A. (2005), Behaviour of Slender Structural Elements Having an Arbitrary Attitude in the Wind Field, Ph.D. thesis, University of Genova. 
    12. Cheng, S., Irwin, P.A., Jakobsen, J.B., Lankin, J., Larose, G.L., Savage, M.G., Tanaka, H. and Zurell, C. (2003a), "Divergent motion of cables exposed to skewed wind", Proceedings of the Fifth Int. Symposium on Cable Dynamics, S. Margherita Ligure (Italy), September 2003, 271-278. 

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