Extreme Value Predictions for Wave- and Wind-induced Loads on Floating Offshore Wind Turbines using FORM

Sunvard Joensen, Jørgen Juncher Jensen, Alaa E. Mansour

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The aim of the present paper is to advocate for a very effective stochastic procedure, based on the First Order Reliability Method (FORM), for extreme value predic-tions related to wave induced loads. Due to the efficient optimisation procedures implemented in standard FORM codes and the short duration of the time domain simulations needed (typically 60-300s to cover the hy-drodynamic memory effects in the response) the calcu-lation of the mean out-crossing rates of a given response are very fast. Thus complicated non-linear effects can be included. The FORM analysis also identifies the most probable wave episodes leading to given re-sponses. As an example the motions of floating foundations for offshore wind turbines are analysed taking into consid-eration both the wave and wind induced loads and con-sidering different mooring systems. The possible large horizontal motions make it important to calculate the wave loads at the instantaneous position of the floater.
Original languageEnglish
Title of host publication10'th Int. Symposium PRADS'2007 : Practical Design of Ships and other Floating Structures
Number of pages1357
Volume2
Place of PublicationPennsylvania, USA
PublisherABS
Publication date2007
Pages1158-1166
ISBN (Print)0-943870-05-4
Publication statusPublished - 2007
Event10th International Symposium on Practical Design of Ships and Other Floating Structures - Houston, TX, United States
Duration: 1 Oct 20075 Oct 2007
Conference number: 10

Conference

Conference10th International Symposium on Practical Design of Ships and Other Floating Structures
Number10
CountryUnited States
CityHouston, TX
Period01/10/200705/10/2007

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