Experimental Study of an Offshore Wind Turbine TLP in ULS Conditions

Christof Wehmeyer, Francesco Ferri, Jesper Skourup, Peter Frigaard

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)

Abstract

An extensive model test program has been carried out in order to assess
the behavior of a tension leg moored substructure as support of a
floating offshore wind turbine (FOWT). The floater was inspired by an
industrial design. The tests focused on the ultimate limit state (ULS)
behavior, therefore no aerodynamic or gyroscopic effects were
included, i.e. the turbine hub was represented by a lumped mass, and focus was given to wave forces and dynamic behavior. The model tests have been conducted in the 3D deep water basin of the Hydraulics and Coastal Engineering Laboratory at the University of Aalborg at a scale of 1:80. The model tests were made with a range of monochromatic, bichromatic and irregular waves. All waves are modeled long crested and were run with and without sub and super harmonics. Three different structure layouts were tested, i.e. the tests were run with substructure only, with a rigid tower representation and with a flexible tower representation. Three submerged load cells measured the response of the tendons, and two accelerometers measured the response of the total structure, being located at the substructure – tower interface and in the nacelle. The paper intends to describe the setup of the test and presents some selected interim results.
Original languageEnglish
Title of host publicationThe Proceedings of the Twenty-third (2013) International Offshore and Polar Engineering Conference
Number of pages8
Volume1
PublisherInternational Society of Offshore & Polar Engineers
Publication date2013
Pages301-308
ISBN (Electronic)978-1-880653-99-9
Publication statusPublished - 2013
EventThe 23rd International Ocean and Polar Engineering Conference - Anchorage, Alaska, United States
Duration: 30 Jun 20135 Jul 2013

Conference

ConferenceThe 23rd International Ocean and Polar Engineering Conference
CountryUnited States
CityAnchorage, Alaska
Period30/06/201305/07/2013
SeriesProceedings of the International Offshore and Polar Engineering Conference
ISSN1098-6189

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Keywords

  • Floating Offshore Wind Turbine
  • Physical Model Test
  • Tension Leg Platform

Cite this

Wehmeyer, C., Ferri, F., Skourup, J., & Frigaard, P. (2013). Experimental Study of an Offshore Wind Turbine TLP in ULS Conditions. In The Proceedings of the Twenty-third (2013) International Offshore and Polar Engineering Conference (Vol. 1, pp. 301-308). International Society of Offshore & Polar Engineers. Proceedings of the International Offshore and Polar Engineering Conference