Passive damping systems for floating vertical axis wind turbines analysis

Michael Borg, Esteban Utrera Ortigado, Maurizio Collu, Feargal P. Brennan

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

7 Citations (Scopus)


The motion of floating platforms reduces the aerodynamic performance of floating wind turbines and increases fatigue loading. One approach to combat this is to use passive damping systems to reduce the motion of the floating wind turbine. In this paper an evaluation and selection of passive damping devices for a semi-submersible support structure for floating wind turbines is presented. A preliminary design for each of the three most optimal damping devices (heave bottom plates, anti-roll tanks and open-bottom tanks) mounted on the specified support structure are presented. A dynamic response analysis in the frequency domain was carried out for each of the devices. The resulting response amplitude operators (RAOs) are compared against the original support structure RAOs in heave and roll to highlight the effects of the damping systems. It was found that the heave bottom plates produced the largest motion reduction in heave whilst the anti-roll tanks performed best in roll. These three damping devices were applied to a floating vertical axis wind turbine in a time-domain analysis through the use of a de-coupled aero-hydro dynamics model.

Original languageEnglish
Title of host publicationEuropean Wind Energy Conference and Exhibition, EWEC 2013
Place of PublicationRed Hook, NY
PublisherEuropean Wind Energy Association
Number of pages10
ISBN (Print)9781632663146
Publication statusPublished - 1 Jan 2013
EventEuropean Wind Energy Conference and Exhibition, EWEC 2013 - Vienna, United Kingdom
Duration: 4 Feb 20137 Feb 2013


ConferenceEuropean Wind Energy Conference and Exhibition, EWEC 2013
CountryUnited Kingdom


  • dynamics
  • floating VAWT
  • modelling
  • offshore
  • passive damping

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