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    Parametric motion detection for an oscillating water column spar buoy

    Giorgi, G. and Ringwood, John (2018) Parametric motion detection for an oscillating water column spar buoy. In: Advances in Renewable Energies Offshore. Taylor & Francis, pp. 502-512. ISBN 9781138585355

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    Parametric resonance is a highly nonlinear phenomenon, difficult to model and foresee, with often detrimental consequences on the power production efficiency of wave energy converters. Parametric excitation, due to time-varying parameters of the system, activates an internal excitation mechanism, which diverts part of the energy from the principal degree of freedom, consequently generating parasitic motions. Although the ability of a mathematical model to articulate parametric instability is beneficial for design and control purposes, the increase in computational burden and complexity is often unacceptable. However, using computationally frugal nonlinear Froude-Krylov force calculations, applicable to axisymmetric devices, it is possible to define mathematical models fast enough for computation in real time. The focus of the paper is a floating oscillating water column device, inspired by the Sparbuoy device, in order to demonstrate the ability of such a mathematical model to describe parametric roll responses.

    Item Type: Book Section
    Additional Information: Funding: This paper is based upon work supported by Science Foundation Ireland under Grant No. 13/IA/1886.
    Keywords: Parametric; motion detection; oscillating water column; spar buoy;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 14298
    Identification Number:
    Depositing User: Professor John Ringwood
    Date Deposited: 01 Apr 2021 13:34
    Publisher: Taylor & Francis
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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