Abstract
Physical experiments investigating the extreme responses of a semi-submersible floating
offshore wind turbine were conducted to allow a comparison of design wave methods. A 1:70 scale model of
the IEA 15MW reference turbine and VolturnUS-S platform was studied focusing on the hydrodynamics under
parked turbine conditions. A comparison of characteristic load predictions was made between design standard
recommendations by the IEC and DNV covering different design wave types and post processing methods.
Constrained waves are permitted for predicting characteristic loads for fixed offshore turbines but the extent
to which they are suitable for floating devices is questionable. A constrained wave method for characteristic
load prediction is applied and it is concluded that in general characteristic responses related to pitch may be
estimated well with single response conditioned focused waves but for response types where the low frequency
surge is important, e.g. mooring loads, constrained focused waves need to be applied.
offshore wind turbine were conducted to allow a comparison of design wave methods. A 1:70 scale model of
the IEA 15MW reference turbine and VolturnUS-S platform was studied focusing on the hydrodynamics under
parked turbine conditions. A comparison of characteristic load predictions was made between design standard
recommendations by the IEC and DNV covering different design wave types and post processing methods.
Constrained waves are permitted for predicting characteristic loads for fixed offshore turbines but the extent
to which they are suitable for floating devices is questionable. A constrained wave method for characteristic
load prediction is applied and it is concluded that in general characteristic responses related to pitch may be
estimated well with single response conditioned focused waves but for response types where the low frequency
surge is important, e.g. mooring loads, constrained focused waves need to be applied.
| Original language | English |
|---|---|
| Title of host publication | Trends in Renewable Energies Offshore |
| Subtitle of host publication | Proceedings of the 5th International Conference on Renewable Energies Offshore |
| Publisher | CRC Press |
| Pages | 609-617 |
| Number of pages | 9 |
| Edition | 1st |
| ISBN (Electronic) | 9781003360773 |
| DOIs | |
| Publication status | Published - 2 Nov 2022 |
| Event | 5th International Conference on Renewable Energies Offshore, RENEW 2022 - Lisbon, Portugal Duration: 8 Nov 2022 → 10 Nov 2022 |
Conference
| Conference | 5th International Conference on Renewable Energies Offshore, RENEW 2022 |
|---|---|
| Country/Territory | Portugal |
| City | Lisbon |
| Period | 8/11/22 → 10/11/22 |
Keywords
- Floating wind
- semi-sub
- extreme response
- reliability
- focused wave
- short design wave
