NDLI: On Weibull Extreme Response of Offshore Structures

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chen, Cheng-Yo Mills, Trevor
Copyright Year	2010
Abstract	This paper investigates the so-called two-parameter and three-parameter Weibull distribution functions with regard to their technical formulation and application to prediction of extreme responses of offshore structures. The validity of predicted Weibull extreme responses is evaluated using time-history responses of two floating structures (a Spar and a Truss Semi) and a fixed-base compliant tower platform. All these structures were previously designed for harsh environments in deepwater beyond 1,700 ft. in the Gulf of Mexico. The evaluation results indicate that the maximum responses predicted by both two-parameter and three-parameter Weibull distribution functions with a single 3-hr simulation agree well with those obtained from a more lengthy and rigorous process with numerous 3-hr time-history responses. It also shows that the predicted maxima from the two-parameter Weibull distribution function are more reliable and have less statistical variability than those from the three-parameter Weibull distribution function, particularly for highly nonlinear wide-banded non-Gaussian responses such as minimum air gaps at the cellar deck of the topsides of the floating structures. The approach using the two-parameter Weibull function as presented in this paper is thus an appealing tool in predicting maximum responses and will greatly improve the process in the early design stage of a fast track project.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	295
Ending Page	302
Page Count	8
File Format	PDF
ISBN	9780791849095
DOI	10.1115/OMAE2010-20476
e-ISBN	9780791838730
Volume Number	29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 1
Conference Proceedings	ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2010-06-06
Publisher Place	Shanghai, China
Access Restriction	Subscribed
Subject Keyword	Design Gulf of mexico Simulation Offshore structures Weibull distribution Floating structures Spar platforms Trusses (building) Wing spars
Content Type	Text
Resource Type	Article

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