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RESEARCH PAPERS: Offshore Mechanics

A Comparison of Methods for Synthesis of Directional Seas

[+] Author and Article Information
M. D. Miles, E. R. Funke

Hydraulics Laboratory, National Research Council of Canada, Ottawa, Ontario, Canada

J. Offshore Mech. Arct. Eng 111(1), 43-48 (Feb 01, 1989) (6 pages) doi:10.1115/1.3257137 History: Received January 01, 1987; Revised May 18, 1988; Online October 30, 2009

Abstract

Numerical models for synthesis of directional seas are evaluated. Several authors have recently reported limitations associated with the commonly used double summation model which is neither ergodic nor spatially homogeneous for a finite number of terms. In order to overcome these problems, a modified double summation model is presented which uses unidirectional, narrow-band random wave trains as the fundamental components rather than plane sinusoidal waves. Various alternatives for generating the fundamental wave trains are investigated by numerical simulation and results are also compared to a simpler single summation wave model.

Copyright © 1989 by ASME
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