Boaghe, O.M., Billings, S.A. and Stansby, P.K.
(1997)
Spectral Analysis of Nonlinear Wave Forces.
Research Report.
ACSE Research Report 673
.
Department of Automatic Control and Systems Engineering
Abstract
The spectral analysis of nonlinear wave forces is investigated, based on the Morison equation and related models including the recently introduced Dynamic Morison model. An expression for the response power spectrum is initially derived in terms of the higher-order nonlinear frequency response functions and the spectrum of the input velocity. It is then shown how this can be evaluated for the Dynamic Morison model to yield an expression for the output power spectrum in terms of the coefficients of the time-domain differential equations and properties of the input. A comparison of the output spectra computed using traditional methods and the new expression of the response spectrum over several data sets is included. An interpretation of the Morison equation response spectrum is finally given.
Metadata
Item Type:
Monograph
Authors/Creators:
Boaghe, O.M.
Billings, S.A.
Stansby, P.K.
Copyright, Publisher and Additional Information:
The Department of Automatic Control and Systems Engineering research reports offer a forum for the research output of the academic staff and research students of the Department at the University of Sheffield. Papers are reviewed for quality and presentation by a departmental editor. However, the contents and opinions expressed remain the responsibility of the authors. Some papers in the series may have been subsequently published elsewhere and you are advised to cite the later published version in these instances.
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