Effect of floating substructure flexibility of large-volume 10 MW offshore wind turbine semi-submersible platforms on dynamic response
As the dimension of the floating substructures for ultra-large wind turbines increases, the flexibility of the large-volume floating substructures may increase to the extent that may significantly affect the dynamic responses of an ultra-large semi-submersible floating offshore wind turbine (FOWT), which introduces new challenges in capturing relevant physical effect in numerical simulation analysis. This paper describes a newly designed semi-submersible substructure for the Technical University of Denmark (DTU) 10 MW wind turbine, and the substructural flexibility is considered in aero-hydro-servo-elastic dynamic simulations by extending the simulation OpenFAST Code, including wave-structure interactions. A comprehensive comparison of flexible and rigid large-volume substructures models is presented to highlight the effect of substructural flexibility on the hydrodynamic loads and dynamic responses of the integrated FOWT system by implementing a fully coupled simulation analysis in the time domain. Additionally, the difference of flexible and rigid large-volume substructures models on the structural fatigue behavior of the novel semi-submersible FOWT is investigated and discussed by computing ultimate and damage-equivalent loads (DELs) for selected environmental conditions. The results show that the substructural flexibility has a significant impact on fatigue damage of the integrated FOWT system in operating sea states than that in extreme sea state.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
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Supplemental Notes:
- © 2022 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
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Authors:
- Zhao, Zhixin
- Wang, Wenhua
- Shi, Wei
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0000-0002-6312-0494
- Qi, Shengwenjun
- Li, Xin
- Publication Date: 2022-9-1
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References; Tables;
- Pagination: 111934
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Serial:
- Ocean Engineering
- Volume: 259
- Issue Number: 0
- Publisher: Pergamon
- ISSN: 0029-8018
- EISSN: 1873-5258
- Serial URL: http://www.sciencedirect.com/science/journal/00298018
Subject/Index Terms
- TRT Terms: Fatigue (Mechanics); Flexibility; Offshore structures; Semisubmersibles; Turbines
- Subject Areas: Marine Transportation; Terminals and Facilities;
Filing Info
- Accession Number: 01852706
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 22 2022 5:06PM