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TECHNICAL PAPERS

Probabilistic Models Applicable to the Short-Term Extreme Response Analysis of Jack-Up Platforms

[+] Author and Article Information
M. J. Cassidy

Centre for Offshore Foundation Systems, The University of Western Australia, Australia

G. T. Houlsby, R. Eatock Taylor

Department of Engineering Science, Oxford University, United Kingdom

J. Offshore Mech. Arct. Eng 125(4), 249-263 (Oct 01, 2003) (15 pages) doi:10.1115/1.1600470 History: Received December 01, 2001; Revised December 01, 2002; Online October 01, 2003
Copyright © 2003 by ASME
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References

Figures

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General layout of idealized jack-up used in the analyses
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Expansion of yield surface with plastic vertical displacement
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Strain hardening law determining yield-surface size
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NewWave surface elevation at the upwave and downwave legs
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Size of the yield surface in the M/2R:V plane
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Definition of basic random variable Pre-load
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Definition of fp (based on hardening law of Equation 8)
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Central composite design method for two random variables (k=2)
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Extreme deck displacement distributions for the most-probable highest wave amplitudes for the 100-year sea-state
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Comparison of deck displacements predicted by the RS and evaluate by JAKUP for 1000 sets of basic random variables (X)
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Comparison of response evaluated by the RS and JAKUP for 200 sets of (X) at three levels of deck displacement
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Short-term extreme deck displacement distributions for the modal most probable highest wave amplitude in the 100-year sea-state for sets of 11 and 7 random variables
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Significance of the inclusion of short-term extreme wave amplitude variation in the extreme deck displacement distributions
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Extreme deck displacement distributions for the 100-year sea-state with and without variation in the basic variables
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Comparison of linear and nonlinear response to short-term statistics

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