Second and third order sub-harmonic wave responses of a floating wind turbine

J. Orszaghova*, P. H. Taylor, H. Wolgamot, F. J. Madsen, A. Pegalajar-Jurado, H. Bredmose

*Corresponding author for this work

Research output: Contribution to conferencePaperResearch

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Abstract

The expansion of offshore wind farms into deeper water requires floating concepts, as bottom-fixed monopile turbines become prohibitively expensive. In this work, a catenary moored floater system is investigated. Such systems typically have large natural periods in those modes where the hydrostatic stiffness is small (or zero), as the restoring force provided by the mooring is low. Since the hydrodynamic damping is weak, the systems are highly resonant. It is well known that low-frequency resonant motions of soft moored structures can be excited by second-order hydrodynamic loads. Here, we show that, for the floater considered, third-order difference interactions can also give rise to considerable resonant pitch motions.
Original languageEnglish
Publication date2020
Number of pages4
Publication statusPublished - 2020
Event35th International Workshop on Water Waves and Floating Bodies (IWWWFB 2020) - Seoul National University, Soul, Korea, Republic of
Duration: 26 Apr 202029 Apr 2020

Conference

Conference35th International Workshop on Water Waves and Floating Bodies (IWWWFB 2020)
LocationSeoul National University
Country/TerritoryKorea, Republic of
CitySoul
Period26/04/202029/04/2020

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