On Motion and Hydroelastic Analysis of a Floating Offshore Wind Turbine

Azin Lamei, Masoud Hayatdavoodi, Carlos Wong, Bin Tang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)
101 Downloads (Pure)

Abstract

This study is concerned with motion analysis and hydroelastic response of a floating offshore wind turbine to wave loads. The novel floating structure, made of prestressed concrete, is designed to support multiple wind turbines, and it rotates according to the environmental loads to face the incoming wind. The floating structure is attached to a mooring line that allows the rotation of the structure in response to the environmental loads. The floating structure is an equilateral triangular platform. The wind turbines are located at the vertices. Due to the dimensional characteristics of the structure, elasticity of the floating platform plays an important role in its dynamics. While the dynamic response of the structure is driven by both aerodynamic and hydrodynamic loads, this study focuses on the motion and elastic response of the novel floating structure to the hydrodynamic loads only. The three dimensional hydrodynamic loads on the floating structure are obtained by use of the constant panel approach of the Green function method, subject to linear mooring loads. A finite element analysis is carried out for the calculation of the elastic response of the structure. Computations of the integrated linear structurefluid-structure interaction problem are performed in frequency domain using HYDRAN, a computer program written for the linear dynamic analysis of rigid and flexible bodies. Results presented here include the response amplitude operators of both the rigid and flexible bodies to incoming waves of various frequencies and directions. Also presented are the wave-induced stresses on the floating body, and the elastic deformations.
Original languageEnglish
Title of host publicationProceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE 2019
Subtitle of host publicationOcean Engineering
PublisherAmerican Society of Mechanical Engineers
Number of pages10
ISBN (Electronic)9780791858899
ISBN (Print)9780791858844
DOIs
Publication statusPublished - 11 Nov 2019
EventASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom
Duration: 9 Jun 201914 Jun 2019

Conference

ConferenceASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
CountryUnited Kingdom
CityGlasgow
Period9/06/1914/06/19

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