Wake Oscillator Model for Vortex-Induced Vibrations Predictions on Low Aspect Ratio Structures
Abstract
A phenomenological Wake Oscillator Model (WOM) is studied to capture the coupling effects between the fluid and the structure. The Vortex-Induced Vibration (VIV) phenomenon is modelled to describe the motion imposed by the lift forces on the structure. The influence of the aspect ratio parameter (L/D) was introduced into the model to characterize the VIV phenomenon for finite cylinders. The proposed model captured the basic features of the VIV such as the amplitude of vibration, frequency, and lift coefficient by coupling the structural equation to the wake equation. Predictions of the WOM are discussed and compared with the experimental data in order to establish a relationship describing VIV as a factor of aspect ratios.
##Keywords:##
Vortex-Induced Vibrations; Wake Oscillator Model, circular cylindrical structure; aspect ratio effects.
Published
Jan 20, 2015
How to Cite
RAHMAN, Mohd Asamudin A et al.
Wake Oscillator Model for Vortex-Induced Vibrations Predictions on Low Aspect Ratio Structures.
Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 15, n. 1, p. 1-6, jan. 2015.
ISSN 2527-6085.
Available at: <https://isomase.org/Journals/index.php/jomase/article/view/461>. Date accessed: 17 apr. 2026.
doi: http://dx.doi.org/10.36842/jomase.v15i1.461.
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[4]. Pantazopolous, M, S (1994). “Vortex-induced vibration parameters: critical review,” 13th International Conference on Offshore Mechanics and Arctic Engineering, Vol 1, pp 199-255.
[5]. Williamson, C, H, K, Govardhan, R (2008). “A brief review of recent results in vortex-induced vibrations,” Journal of Wind Engineering and Industrial Aerodynamics, Vol 96, pp 713-735.
[6]. Chen, S, S (1987). “Flow induced vibration of circular cylindrical structures,” Springer, Washington DC, US: Hemisphere Publishing Corporation.
[7]. Blevins, R, D (1990). “Flow-induced vibration,” New York: Van Nostrand Reinhold.
[8]. Sumer, B, M, and Fredsoe, J (1997). “Hydrodynamics around cylindrical structures,” Singapore: World Scientific.
[9]. Gabbai, R, D, and Benaroya, H (2005). “An overview of modelling and experiments of vortex-induced vibration of circular cylinders,” Journal of Sound and Vibration, Vol 282, pp 575-616.
[10]. Bishop, R, E, D, and Hassan A, Y (1964). “The lift and drag forces on a circular cylinder in a flowing fluid,” Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol 277 (1368), pp 32-50.
[11]. Hartlen R, T, and Currie, G (1970). “Lift-oscillator model of vortex-induced vibration,” Journal of the Engineering Mechanics Division, Vol 5, pp 577-591.
[12]. Skop, R, A, and Griffin, O, M (1973). “A model for the vortex-excited resonant response of bluff cylinders,” Journal of Sound and Vibration, Vol 27(2), pp 225-233.
[13]. Iwan, W, D, and Blevins, R, D (1974). “A model for vortex induced oscillation of structures,” Journal of Applied Mechanic, Vol 41, pp 581-586.
[14]. Landl, R (1974). “A mathematical model for vortex-excited vibrating bluff-bodies,” Journal of Sound and Vibration, Vol 42, pp 219-234.
[15]. Griffin, O, M (1980). “Vortex-excited cross-flow vibrations of a single cylindrical tube,” ASME Journal of Pressure Vessel Technology, Vol 102, pp 158 – 166.
[16]. Facchinetti, M, L, de Langrea E, and Biolleyb, F (2004). “Coupling of structure and wake oscillators in vortex-induced vibrations,” Journal of Fluids and Structures, Vol 19, pp 123–140.
[17]. Simiu, E, and Scanlan, R, H (1986). “Wind effects on structures,” Wiley-Interscience, New York, Second Edition.
[18]. Goswami, I, Scanlan, R, H, Jones, N, P (1993). “Vortex-induced vibration of circular cylinders-part 2: new model, ”ASCE Journal of Engineering Mechanics, Vol 119, pp 2288–2302.
[19] .Sarpkaya, T (1978). “Fluid forces on oscillating cylinders,” Journal of Waterway Port Coastal and Ocean Division ASCE, WW4, Vol 104, pp 275-290.
[20]. Griffin, O, M, Koopman, G, H (1997). “The vortex-excited lift and reaction forces on resonantly vibrating cylinders,” Journal of Sound and Vibration, Vol 54, pp 435–448.
[21]. Birkhoff, G, and Zarantanello, E, H (1957). “Jets, wakes and cavities,” Academic Press, New York.
[22]. Nayfeh A, H (1993). “Introduction to perturbation techniques,” Wiley, New York.
[23] .Rahman, M. A. A., and Thiagarajan, K. (2013). “Vortex-Induced Vibration of Cylindrical Structure with Different Aspect Ratio,” Proceedings of the 23rd International Offshore and Polar Engineers, Alaska, USA. [24]. Gonçalves, R, T, Franzini, G, R, Rosetti, G, F, Meneghini, J, R, and Fujarra, A, L, C. “Flow around circular cylinders with very low aspect ratio,” Journal of Fluids and Structures, http://dx.doi.org/10.1016/j.jfluidstructs.2014.11.003.
