Dynamic response of a shallow-draft floating wind turbine concept: Experiments and modelling

Alicia Terrero Gonzalez, Saishuai Dai, Richard Neilson, Jim Papadopoulos, Marcin Kapitaniak* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper considers the dynamic response of a novel lightweight FOWT concept being developed by T-Omega Wind Ltd, that is able to float over even steep high waves, and be economical in deep water. The study aims to understand the response to waves during marine operations (installation, or maintenance) as part of optimizing its design. For this purpose real-time 6 degrees-of-freedom (6 DOF) simulations are computed for the system under operational and extreme sea wave scenarios in the state-of-the-art Multiphysics Marine Simulator at the National Decommissioning Centre (NDC). RAOs for heave and pitch displacements are evaluated across varying wave heights and periods of excitation to identify system behaviour including resonant frequencies. The model is calibrated by adjusting system damping parameters for each wave frequency to match experimental tests on a 1:60 scaled prototype at the Kelvin Hydrodynamics Laboratory, resulting in an ad hoc damping expression to produce appropriate system dynamic behaviour for “High” and “Low” Sea States. The study concludes by identifying ranges of wave parameters that limit peak motions, proposes analytical expressions for RAO responses and provides damping parameters that validate the Marine Simulator as a suitable tool to predict FOWT dynamic responses with reduced computation time.
Original languageEnglish
Article number120454
Number of pages39
JournalRenewable Energy
Early online date5 Apr 2024
DOIs
Publication statusE-pub ahead of print - 5 Apr 2024

Bibliographical note

Acknowledgments
The authors wish to thank T-Omega Wind Ltd for their support towards this project and the TechX Accelerator Program for funding the experimental tests performed at the KHL. This work has benefited from the support and funding received from Net Zero Technology Centre and The University of Aberdeen through their partnership in the National Decommissioning Centre (NDC) and the Scottish Government’s Decommissioning Challenge Fund in part-funding the establishment of the marine simulator research facility at the NDC.

Data Availability Statement

Data will be made available on request

Keywords

  • Floating Offshore Wind Turbine
  • Dynamics analysis
  • RAO
  • Marine Simulator

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