Simple record

dc.rights.licenseAttribution 4.0 International*
dc.contributor.authorPenalba, Markel
dc.contributor.otherKelly, Thomas
dc.contributor.otherZabala, Iñaki
dc.contributor.otherPeña-Sánchez, Yerai
dc.contributor.otherRingwood, John V.
dc.description.abstractWithin the wave energy community, hydrodynamic coefficients obtained from boundary element methods (BEMs) are commonly used to predict the behaviour of wave energy converters (WECs) in response to incident waves. A number of commercially-available BEM solvers exist, with a number of open-source alternatives also available. While open-source solvers have an obvious cost advantage compared to their commercial counterparts, the results from such solvers are often susceptible to so-called ‘irregular frequencies’, which arise from ill-conditioning in boundary integral problems, and result in large under- or over-estimation of hydrodynamic parameters at certain excitation frequencies. Furthermore, while commercial solvers may employ techniques to suppress the effects of irregular frequencies, such solvers may, under certain circumstances, exhibit other problems in the hydrodynamic results produced. For example, the results obtained for the added mass at high frequencies, and the infinite frequency added mass for a water column, may be incorrect. The current work first focusses on an approach to remove the effects of irregular frequencies from the results obtained for the radiation damping of a particular WEC geometry. The use of radiation damping results to obtain values for the added mass, through the use of the Ogilvie relations, is then considered. The technique described herein has been implemented in BEMRosetta, an open-source tool which allows a user to view the results from various BEM solvers, as well as converting input files between solvers. The results presented in this paper have been obtained using the BEMRosetta implementation.en
dc.publisherEuropean Wave and Tidal Energy Conferenceen
dc.rights© 2022 The Authorsen
dc.subjectBoundary element methodsen
dc.subjectIrregular frequenciesen
dc.subjectNumerical modellingen
dc.titleA post-processing technique for removing ‘irregular frequencies’ and other issues in the results from BEM solversen
dcterms.sourceInternational Marine Energy Journalen
local.contributor.groupMecánica de fluidoses
local.contributor.otherinstitutionDundalk Institute of Technologyen
local.contributor.otherinstitutionSENER Ingeniería y Sistemas,
local.contributor.otherinstitutionMaynooth Universityen
local.contributor.otherinstitutionUniversidade de Lisboapt
local.contributor.otherinstitutionUniversidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU)es
local.source.detailsVol. 5. Nº 1. Pp. 123–131en

Files in this item


This item appears in the following Collection(s)

Simple record

Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International