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RESEARCH PAPERS

Extreme Jack-Up Response: Simulation and Nonlinear Analysis Methods

[+] Author and Article Information
S. R. Winterstein, R. Torhaug

Civil Engineering Department, Stanford University, Stanford, CA 94305-4020

J. Offshore Mech. Arct. Eng 118(2), 103-108 (May 01, 1996) (6 pages) doi:10.1115/1.2828817 History: Received November 01, 1995; Revised January 17, 1996; Online December 17, 2007

Abstract

The nonlinear dynamic response of a jack-up structure under random wave loads is considered. For a simplified jack-up model, average behavior and variability in extreme forces and responses are found from simulation over many 6-h seastates. Weibull and Hermite analytical models of response extremes are also presented and evaluated. These models use shorter, less expensive simulations to estimate a limited number of response statistics, such as moments or parameters of the response peak distribution, and fit analytical models to estimate global extremes. Necessary simulation lengths are established both for direct simulation of extremes, and for analytical extreme models.

Copyright © 1996 by The American Society of Mechanical Engineers
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