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RESEARCH PAPERS: Offshore Mechanics/Ocean Engineering/Arctic Engineering

ARMA Algorithms for Ocean Wave Modeling

[+] Author and Article Information
P-T. D. Spanos

University of Texas, Austin, Tex. 78712

J. Energy Resour. Technol 105(3), 300-309 (Sep 01, 1983) (10 pages) doi:10.1115/1.3230919 History: Received September 13, 1982; Revised April 28, 1983; Online October 22, 2009

Abstract

Three different algorithms are presented for simulating a time series which is compatible with a given power spectrum of ocean waves. The first algorithm generates the current value of the time series as the sum of a linear combination of its past values and a white noise deviate. The second algorithm produces the values of the time series as a linear combination of white noise deviates. The third algorithm is a combination of the first and second algorithms. These algorithms are applied to the Pierson-Moskowitz (P-M) spectrum, exclusively. The third algorithm is associated with simple analog filter approximations of the P-M spectrum. The advantages and disadvantages of each of the three algorithms are discussed in context with their applicability to offshore engineerng problems.

Copyright © 1983 by ASME
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