RESEARCH PAPERS: Offshore Mechanics

An Efficient Numerical Method for Calculating the Statistical Distribution of Combined First-Order and Wave-Drift Response

[+] Author and Article Information
A. Naess

Department of Civil Engineering, Norwegian Institute of Technology, Trondheim, Norway

J. M. Johnsen

Kvaerner Engineering a/ s, Lysaker, Norway

J. Offshore Mech. Arct. Eng 114(3), 195-204 (Aug 01, 1992) (10 pages) doi:10.1115/1.2919971 History: Received August 12, 1991; Revised February 21, 1992; Online June 12, 2008


The paper describes an efficient and accurate numerical procedure for calculating the probability distribution function of combined first-order and slowly varying, second-order hydrodynamic loads and response of compliant offshore structures. No approximations are made except those inherent in the numerical calculations. The method does not require extensive computer capacity; in fact it can be implemented on any standard PC. Several example calculations serve to illustrate the method, and its accuracy is demonstrated by comparison with cases where exact analytical results are available. The accuracy of previously proposed approximations are also discussed.

Copyright © 1992 by The American Society of Mechanical Engineers
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