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A Computational Framework for Fully Coupled Time-Domain Aero-Hydro-Servo-Elastic Analysis of Hybrid Offshore Wind and Wave Energy Systems by Deploying Generalized Modes
Mantadakis, N.; Loukogeorgaki, E.; Troch, P. (2025). A Computational Framework for Fully Coupled Time-Domain Aero-Hydro-Servo-Elastic Analysis of Hybrid Offshore Wind and Wave Energy Systems by Deploying Generalized Modes. J. Mar. Sci. Eng. 13(11): 2047. https://dx.doi.org/10.3390/jmse13112047
In: Journal of Marine Science and Engineering. MDPI: Basel. ISSN 2077-1312; e-ISSN 2077-1312, meer
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| Author keywords |
combined wind and wave utilization;hybrid offshore wind and wave energy systems;floating offshore wind turbines;wave energy converters;generalized-mode approach;numerical simulation;responses;turbine |
| Auteurs | | Top |
- Mantadakis, N.
- Loukogeorgaki, E.
- Troch, P., meer
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| Abstract |
In this paper, a generic computational framework, based on the generalized-mode approach, is developed for the fully coupled time-domain aero-hydro-servo-elastic analysis of Hybrid Offshore Wind and Wave Energy Systems (HOWiWaESs), consisting of a Floating Offshore Wind Turbine (FOWT) and several wave energy converters (WECs) mechanically connected to it. The FOWT's platform and the WECs of the HOWiWaES are modeled as a single floating body with conventional rigid-body modes, while the motions of the WECs relative to the FOWT are described as additional generalized modes of motion. A numerical tool is established by appropriately modifying/extending the OpenFAST source code. The frequency-dependent exciting forces and hydrodynamic coefficients, as well as hydrostatic stiffness terms, are obtained using the traditional boundary integral equation method, whilst the generalized-mode shapes are determined by developing appropriate 3D vector shape functions. The tool is applied for a 5 MW FOWT with a spar-type floating platform and a conic WEC buoy hinged on it via a mechanical arm, and results are compared with those of other investigators utilizing the multi-body approach. Two distinctive cases of a pitching and a heaving WEC are considered. A quite good agreement is established, indicating the potential of the developed tool to model floating HOWiWaESs efficiently. |
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