Wave and Wind Responses of a Very-Light FOWT with Guy-Wired-Supported Tower: Numerical and Experimental Studies

Hideyuki Suzuki; Hiroki Shiohara; Anja Schnepf; Hidetaka Houtani; Lucas H. S. Carmo; Shinichiro Hirabayashi; Ken Haneda; Toshiki Chujo; Yasunori Nihei; Edgard B. Malta; Rodolfo T. Gonçalves

doi:10.3390/jmse8110841

Journal of Marine Science and Engineering (Oct 2020)

Wave and Wind Responses of a Very-Light FOWT with Guy-Wired-Supported Tower: Numerical and Experimental Studies

Hideyuki Suzuki,
Hiroki Shiohara,
Anja Schnepf,
Hidetaka Houtani,
Lucas H. S. Carmo,
Shinichiro Hirabayashi,
Ken Haneda,
Toshiki Chujo,
Yasunori Nihei,
Edgard B. Malta,
Rodolfo T. Gonçalves

Affiliations

Hideyuki Suzuki: OSPL—Ocean Space Planning Laboratory, Dept. of Systems Innovation, The University of Tokyo, Tokyo 106-0032, Japan
Hiroki Shiohara: OSPL—Ocean Space Planning Laboratory, Dept. of Systems Innovation, The University of Tokyo, Tokyo 106-0032, Japan
Anja Schnepf: Fluid Mechanics and Energetics Dept., Ecole Centrale de Nantes, 44300 Nantes, France
Hidetaka Houtani: OSPL—Ocean Space Planning Laboratory, Dept. of Systems Innovation, The University of Tokyo, Tokyo 106-0032, Japan
Lucas H. S. Carmo: TPN—Numerical Offshore Tank Laboratory, Dept. of Naval Architecture and Ocean Engineering, University of São Paulo, São Paulo 05508-030, Brazil
Shinichiro Hirabayashi: OSPL—Ocean Space Planning Laboratory, Dept. of Ocean Technology, Policy, and Environment, The University of Tokyo, Chiba 277-0882, Japan
Ken Haneda: Advanced Offshore Technology Dept., NMRI—National Maritime Research Institute, Tokyo 181-0004, Japan
Toshiki Chujo: Advanced Offshore Technology Dept., NMRI—National Maritime Research Institute, Tokyo 181-0004, Japan
Yasunori Nihei: Marine Hydrodynamics Laboratory, Dept. of Aerospace and Marine System Engineering, Osaka Prefecture University, Osaka 599-8531, Japan
Edgard B. Malta: Technomar Engenharia Oceânica, São Paulo 05419-905, Brazil
Rodolfo T. Gonçalves: OSPL—Ocean Space Planning Laboratory, Dept. of Systems Innovation, The University of Tokyo, Tokyo 106-0032, Japan

DOI: https://doi.org/10.3390/jmse8110841
Journal volume & issue: Vol. 8, no. 11
p. 841

Abstract

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A floating offshore wind turbine (FOWT) concept with a guy-wire-supported tower was investigated to obtain motion results in waves considering its elastic model characteristics. The FOWT concept studied aims to reduce the construction costs by using a light-weight structure tensioned with guy wires and a downwind type. Wave tank experiments of an elastically similar segmented backbone model in the 1:60 scale were carried out to clarify the dynamic elastic response features of the structure. The experimental results were compared with numerical simulations obtained from NK-UTWind and WAMIT codes. The bending moment measured at the tower and pontoons had two peak values for different wave periods carried out. The short-wave period peak was due to sagging/hogging when the wavelength matched the floater length. The second peak was due to the large tower top acceleration, which caused a large bending moment at the tower base and pontoon to support the inertia force. The wind force was not significant to modify the FOWT response. The sensibility analysis in pontoons and tower rigidities confirmed the importance of the guy wires to support the inertia due to the waves and wind incidence. The new concept of a very-light FOWT with a guy-wire-supported tower may be an option for future FOWT developments.

Published in Journal of Marine Science and Engineering

ISSN: 2077-1312 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Naval Science: Naval architecture. Shipbuilding. Marine engineering; Geography. Anthropology. Recreation: Oceanography
Website: http://www.mdpi.com/journal/jmse

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