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dc.contributor.authorTrubat Casal, Pau
dc.contributor.authorMolins i Borrell, Climent
dc.contributor.authorHufnagel, Philipp
dc.contributor.authorAlarcón Fernández, Daniel
dc.contributor.authorCampos Hortigüela, Alexis
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2018-07-10T18:44:07Z
dc.date.issued2018
dc.identifier.citationTrubat, P., Molins, C., Hufnagel, P., Alarcon, D., Campos, A. Application of Morison equation in irregular wave trains with high frequency waves. A: International Conference on Ocean, Offshore and Arctic Engineering. "Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering OMAE2018: June 17-22, 2018, Madrid, Spain". American Society of Mechanical Engineers (ASME), 2018, p. 1-10.
dc.identifier.urihttp://hdl.handle.net/2117/119217
dc.description.abstractMost numerical models for the analysis of offshore wind platforms are based on one of two different approaches, depending on how waves forces are applied to the structure: 1) the potential flow theory, and 2) the Morison equation. Potential flow theory allows to compute the wave forces more accurately when diffraction is relevant. Otherwise, this kind of models assume a fixed position of the floating platform when computing the wave forces. Additionally, second-order effects, as the position and the spin of the structure relative to the incident wave can only be taken into account if second order potential flow is considered. On the other hand, Morison equation can apply the wave forces on a structure based on its spin and position which can be assessed at each time step, but is prone to overestimate the waves forces at the frequencies where diffraction is relevant. In this paper, a modification of the implementation of the Morison equation is presented. This modification allows to reduce the forces in the diffraction frequency range based on the real response from MacCamy and Fuchs’s diffraction theory for cylinders. The implementation can be applied using a frequency-dependent coefficient of added mass, or modifying the amplitudes of the incident waves in the diffraction frequency range in a way that the accelerations derived from the regular wave theory used for the Froude-Krylov wave force computation in Morison equation are equivalent to those computed in the diffraction theory. The implementation is tested in the FloawDyn code, developed at the UPC, and FAST from NREL.
dc.format.extent10 p.
dc.language.isoeng
dc.publisherAmerican Society of Mechanical Engineers (ASME)
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica
dc.subjectÀrees temàtiques de la UPC::Energies::Energia eòlica
dc.subject.lcshOffshore wind power plants
dc.titleApplication of Morison equation in irregular wave trains with high frequency waves
dc.typeConference report
dc.subject.lemacAerogeneradors -- Models matemàtics
dc.contributor.groupUniversitat Politècnica de Catalunya. ATEM - Anàlisi i Tecnologia d'Estructures i Materials
dc.rights.accessRestricted access - publisher's policy
drac.iddocument23252045
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorTrubat, P., Molins, C., Hufnagel, P., Alarcon, D., Campos, A.
upcommons.citation.contributorInternational Conference on Ocean, Offshore and Arctic Engineering
upcommons.citation.publishedtrue
upcommons.citation.publicationNameProceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering OMAE2018: June 17-22, 2018, Madrid, Spain
upcommons.citation.startingPage1
upcommons.citation.endingPage10


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