Effect of panel method codes in estimating the time-domain responses of floating wind turbines
Volume
76
Issue number
2
Article number
76203
Received
01 December 2024
Received in revised form
01 February 2025
Accepted
12 February 2025
Available online
17 February 2025
Authors
Muhammed Ucar1,2, Mohamad Hmedi3, Emre Uzunoglu4,5, Elif Oguz1,6*
1Hydraulics Laboratory, Civil Engineering Department, Middle East Technical University, 06800, Ankara, Türkiye
2Civil Engineering Department, Necmettin Erbakan University, 42140, Konya, Türkiye
3Alcatel Submarine Networks Marine, 92150, Suresnes, France
4Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa,
1049-001, Lisbon, Portugal
5KONGSTEIN AS, 5257, Bergen, Norway
6METU Center for Wind Energy Research (ODTÜ RÜZGEM), 06800, Ankara, Türkiye
Corresponding author email
Abstract
This study investigates the impact of frequency-domain hydrodynamic outputs from several panel method codes on estimating time domain responses of floating wind turbines. The tools under examination are WAMIT and three open-source codes (HAMS, NEMOH, and BEMUse). The panel method codes deliver hydrodynamic coefficients and exciting forces in the frequency domain. The results serve as inputs to time-domain simulations, from which the coupled responses are calculated. Hence, the differences in frequency-domain inputs are reflected in the time-domain. Two platforms are employed: OC3-Hywind spar and OC4-DeepCWind semi-submersible. Discrepancies between hydrodynamic coefficients, excitation forces, and response amplitude operators are inspected. Then, the floaters’ time-domain responses are questioned in operational and extreme environmental conditions. The findings highlight limited reflection of frequency-domain differences on the platform motions in time-domain.
Keywords
Floating wind turbines, Panel method, Hydrodynamics, Time domain analysis, Frequency domain analysis, Boundary element method, Potential flow solver