A comparison of numerical approaches for the design of mooring systems for wave energy converters

This paper analyses the numerical outcome of applying three different well-known mooring design approaches to a floating wave energy converter, moored by means of four catenary lines. The approaches include: a linearized frequency domain based on a quasistatic model of the mooring lines, a time doma...

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Detalles Bibliográficos
Autores: Touzon, I., Nava, V., de Miguel, B., Petuya, V.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Basque Center for Applied Mathematics (BCAM)
Repositorio:BIRD. BCAM's Institutional Repository Data
OAI Identifier:oai:bird.bcamath.org:20.500.11824/1361
Acceso en línea:http://hdl.handle.net/20.500.11824/1361
Access Level:acceso abierto
Palabra clave:Catenary mooring system
Dynamic mooring lines
Linear hydrodynamics
Wave energy conversion
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spelling A comparison of numerical approaches for the design of mooring systems for wave energy convertersTouzon, I.Nava, V.de Miguel, B.Petuya, V.Catenary mooring systemDynamic mooring linesLinear hydrodynamicsWave energy conversionThis paper analyses the numerical outcome of applying three different well-known mooring design approaches to a floating wave energy converter, moored by means of four catenary lines. The approaches include: a linearized frequency domain based on a quasistatic model of the mooring lines, a time domain approach coupled with an analytic catenary model of the mooring system, and a fully coupled non-linear time domain approach, considering lines' drag and inertia forces. Simulations have been carried out based on a set of realistic combinations of lines pretension and linear mass, subject to extreme environmental conditions. Obtained results provide realistic cost and performance indicators, presenting a comparison in terms of total mooring mass and required footprint, as well as the design line tension and structure offset. It has been found that lines' viscous forces influence significantly the performance of the structure with high pretensions, i.e., >1.2, while there is acceptable agreement between the modelling approaches with lower pretensions. Line tensions are significantly influenced by drag and inertia forces because of the occurrence of snap loads due to the heaving of the floater. However, the frequency domain approach provides an insight towards the optimal design of the mooring system for preliminary designs.202120212020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/20.500.11824/1361reponame:BIRD. BCAM's Institutional Repository Datainstname:Basque Center for Applied Mathematics (BCAM)InglésReconocimiento-NoComercial-CompartirIgual 3.0 Españahttp://creativecommons.org/licenses/by-nc-sa/3.0/es/info:eu-repo/semantics/openAccessoai:bird.bcamath.org:20.500.11824/13612026-06-19T12:47:47Z
dc.title.none.fl_str_mv A comparison of numerical approaches for the design of mooring systems for wave energy converters
title A comparison of numerical approaches for the design of mooring systems for wave energy converters
spellingShingle A comparison of numerical approaches for the design of mooring systems for wave energy converters
Touzon, I.
Catenary mooring system
Dynamic mooring lines
Linear hydrodynamics
Wave energy conversion
title_short A comparison of numerical approaches for the design of mooring systems for wave energy converters
title_full A comparison of numerical approaches for the design of mooring systems for wave energy converters
title_fullStr A comparison of numerical approaches for the design of mooring systems for wave energy converters
title_full_unstemmed A comparison of numerical approaches for the design of mooring systems for wave energy converters
title_sort A comparison of numerical approaches for the design of mooring systems for wave energy converters
dc.creator.none.fl_str_mv Touzon, I.
Nava, V.
de Miguel, B.
Petuya, V.
author Touzon, I.
author_facet Touzon, I.
Nava, V.
de Miguel, B.
Petuya, V.
author_role author
author2 Nava, V.
de Miguel, B.
Petuya, V.
author2_role author
author
author
dc.subject.none.fl_str_mv Catenary mooring system
Dynamic mooring lines
Linear hydrodynamics
Wave energy conversion
topic Catenary mooring system
Dynamic mooring lines
Linear hydrodynamics
Wave energy conversion
description This paper analyses the numerical outcome of applying three different well-known mooring design approaches to a floating wave energy converter, moored by means of four catenary lines. The approaches include: a linearized frequency domain based on a quasistatic model of the mooring lines, a time domain approach coupled with an analytic catenary model of the mooring system, and a fully coupled non-linear time domain approach, considering lines' drag and inertia forces. Simulations have been carried out based on a set of realistic combinations of lines pretension and linear mass, subject to extreme environmental conditions. Obtained results provide realistic cost and performance indicators, presenting a comparison in terms of total mooring mass and required footprint, as well as the design line tension and structure offset. It has been found that lines' viscous forces influence significantly the performance of the structure with high pretensions, i.e., >1.2, while there is acceptable agreement between the modelling approaches with lower pretensions. Line tensions are significantly influenced by drag and inertia forces because of the occurrence of snap loads due to the heaving of the floater. However, the frequency domain approach provides an insight towards the optimal design of the mooring system for preliminary designs.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.11824/1361
url http://hdl.handle.net/20.500.11824/1361
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Reconocimiento-NoComercial-CompartirIgual 3.0 España
http://creativecommons.org/licenses/by-nc-sa/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Reconocimiento-NoComercial-CompartirIgual 3.0 España
http://creativecommons.org/licenses/by-nc-sa/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:BIRD. BCAM's Institutional Repository Data
instname:Basque Center for Applied Mathematics (BCAM)
instname_str Basque Center for Applied Mathematics (BCAM)
reponame_str BIRD. BCAM's Institutional Repository Data
collection BIRD. BCAM's Institutional Repository Data
repository.name.fl_str_mv
repository.mail.fl_str_mv
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