143117 - Mooring analysis of a floating OWC wave energy converter.pdf (4.47 MB)
Mooring analysis of a floating OWC wave energy converter
journal contribution
posted on 2023-05-20, 21:31 authored by Pols, A, Eric GubeschEric Gubesch, Nagi AbdussamieNagi Abdussamie, Irene PenesisIrene Penesis, Christopher ChinChristopher ChinThis investigation focuses on the modelling of a floating oscillating water column (FOWC) wave energy converter with a numerical code (ANSYS AQWA) based on potential flow theory. Free-floating motions predicted by the numerical model were validated against experimental data extrapolated from a 1:36 scale model device in regular and irregular sea states. Upon validation, an assessment of the device’s motions when dynamically coupled with a four-line catenary mooring arrangement was conducted at different incident wave angles and sea states ranging from operational to survivable conditions, including the simulation of the failure of a single mooring line. The lack of viscosity in the numerical modelling led to overpredicted motions in the vicinity of the resonant frequencies; however, the addition of an external linear damping coefficient was shown to be an acceptable method of mitigating these discrepancies. The incident wave angle was found to have a limited influence on the magnitudes of heave, pitch, and surge motions. Furthermore, the obtained results indicated that the mooring restoring force is controlled by the forward mooring lines under the tested conditions.
History
Publication title
Journal of Marine Science and EngineeringVolume
9Article number
228Number
228Pagination
1-22ISSN
2077-1312Department/School
Australian Maritime CollegePublisher
MDPIPlace of publication
SwitzerlandRights statement
Copyright 2021 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/Repository Status
- Open