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

Jana Orszaghova, Paul Taylor, Hugh Wolgamot, Freddy J. Madsen, Antonio Pegalajar-Jurado, Henrik Bredmose

Research output: Chapter in Book/Conference paperConference paperpeer-review

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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
Title of host publicationProceedings of the 35th International Workshop on Water Waves and Floating Bodies
Subtitle of host publicationvirtual workshop
PublisherInternational Workshop on Water Waves and Floating Bodies
Number of pages4
Publication statusPublished - 2020
Event35th International Workshop on Water Waves and Floating Bodies - , Virtual
Duration: 24 Aug 202028 Aug 2020
https://mhl.snu.ac.kr/iwwwfb35/

Workshop

Workshop35th International Workshop on Water Waves and Floating Bodies
Abbreviated titleIWWWFB35
Country/TerritoryVirtual
Period24/08/2028/08/20
Internet address

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