On the use of constrained focused waves for characteristic load prediction

ORCID

Abstract

Physical experiments investigating the extreme responses of a semi-submersible floatingoffshore wind turbine were conducted to allow a comparison of design wave methods. A 1:70 scale model ofthe IEA 15MW reference turbine and VolturnUS-S platform was studied focusing on the hydrodynamics underparked turbine conditions. A comparison of characteristic load predictions was made between design standardrecommendations 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 extentto which they are suitable for floating devices is questionable. A constrained wave method for characteristicload prediction is applied and it is concluded that in general characteristic responses related to pitch may beestimated well with single response conditioned focused waves but for response types where the low frequencysurge is important, e.g. mooring loads, constrained focused waves need to be applied.

Publication Date

2022-11-02

Publication Title

Trends in Renewable Energies Offshore: Proceedings of the 5th International Conference on Renewable Energies Offshore

ISBN

9781003360773

Embargo Period

9999-12-31

Keywords

Floating wind, semi-sub, extreme response, reliability, focused wave, short design wave

First Page

609

Last Page

617

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10.1201/9781003360773-69" data-hide-no-mentions="true">

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