Influence of Clumps-Weighted Moorings on a Spar Buoy Offshore Wind Turbine

Autor: Niccolo Bruschi, Giulio Ferri, Enzo Marino, Claudio Borri
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Energies, Vol 13, Iss 23, p 6407 (2020)
Druh dokumentu: article
ISSN: 13236407
1996-1073
DOI: 10.3390/en13236407
Popis: The spar buoy platform for offshore wind turbines is the most utilized type and the OC3 Hywind system design is largely used in research. This system is usually moored with three catenary cables with 120° between each other. Adding clump weights to the mooring lines has an influence on the platform response and on the mooring line tension. However, the optimal choice for their position and weight is still an open issue, especially considering the multitude of sea states the platform can be exposed to. In this study, therefore, an analysis on the influence of two such variables on the platform response and on the mooring line tension is presented. FAST by the National Renewable Energy Laboratory (NREL) is used to perform time domain simulations and Response Amplitude Operators are adopted as the main indicators of the clump weights effects. Results show that the clump weight mass is not as influential as the position, which turns out to be optimal, especially for the Surge degree of freedom, when closest to the platform.
Databáze: Directory of Open Access Journals
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