Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/126216
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Full metadata record
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dc.contributor.author | Schubert, B. | - |
dc.contributor.author | Robertson, W. | - |
dc.contributor.author | Cazzolato, B. | - |
dc.contributor.author | Ghayesh, M. | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Ocean Engineering, 2020; 197:106828-1-106828-12 | - |
dc.identifier.issn | 0029-8018 | - |
dc.identifier.issn | 1873-5258 | - |
dc.identifier.uri | http://hdl.handle.net/2440/126216 | - |
dc.description | Available online 18 December 2019 | - |
dc.description.abstract | This study compares the response of a submerged CETO-shaped point absorber wave energy converter using linear, partially-nonlinear, pseudo-nonlinear, and fully-nonlinear methods to model hydrodynamic effects. Linear potential flow models calculate hydrodynamic parameters to represent the fluid-structure interaction; typical dynamic models apply these parameters without pose-dependence. The partially-nonlinear method evaluates excitation forces at different poses to introduce a pose-dependent excitation force; in addition to the excitation force, the pseudo-nonlinear method calculates hydrodynamic coefficients using linear potential flow methods and includes pose-dependence through interpolating pre-calculated parameters to represent the radiation force. The fully-nonlinear CFD model is a numerical wave tank validated against published data. The applicability of linear-based methods has been explored by comparing the motion, force, and power of the system under various operating conditions against the fully-nonlinear results. It was expected that for low amplitude waves results tend towards the linear results; however, for both low amplitude waves and increased submergence depth, linear methods provided poor representations of the nonlinear CFD results. Geometric nonlinearities were insufficient to capture all the nonlinear behaviour. A frequency-dependent nonlinearity was identified in the water above the buoy resonating. For such submerged point absorbers, linear methods do not adequately represent the influential nonlinear effects. | - |
dc.description.statementofresponsibility | Benjamin W. Schubert, William S.P. Robertson, Benjamin S. Cazzolato, Mergen H. Ghayesh | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2019 Elsevier Ltd. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1016/j.oceaneng.2019.106828 | - |
dc.subject | Wave energy converter; Submerged point absorber; Fully and partially nonlinear hydrodynamics; Numerical wave tank | - |
dc.title | Linear and nonlinear hydrodynamic models for dynamics of a submerged point absorber wave energy converter | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.oceaneng.2019.106828 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Schubert, B. [0000-0003-2008-8065] | - |
dc.identifier.orcid | Robertson, W. [0000-0001-7351-8378] | - |
dc.identifier.orcid | Cazzolato, B. [0000-0003-2308-799X] | - |
Appears in Collections: | Aurora harvest 8 Mechanical Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_126216.pdf | Accepted version | 6.54 MB | Adobe PDF | View/Open |
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