New Solution for Directional Wave Analysis in Reflective Wave Fields
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126, Issue 4
Abstract
A new and robust method for computing the directional wave spectrum is presented that is valid either in the presence or the absence of phase-locked reflections. The method is a parametric solution to the directional wave spectrum. Unknown parameters are evaluated with the aid of a genetic algorithm. The routine works on the principle of optimizing a fitness parameter that is a function of the difference between the measured and theoretical (parametric) cross spectra. The theoretical cross spectrum is expressed in terms of the principal wave direction, a spreading parameter, a reflection coefficient, and the reflection line distance. This method forms a robust and repeatable solution for the computation of directional wave spectra and the estimation of unbiased frequency dependent reflection coefficients. The method has several advantages over existing methods. These include the fact that valid solutions can be obtained, in the presence or absence of wave reflection, close to or far from the reflector and without a prior knowledge of the reflection line position.
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126 • Issue 4 • July 2000
Pages: 173 - 181
History
Received: Apr 15, 1999
Published online: Jul 1, 2000
Published in print: Jul 2000
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