Damping of Offshore Wind Turbine Tower Vibrations by a Stroke Amplifying Brace

Mark Laier Brodersen, Jan Becker Høgsberg

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Abstract

The potential of installing dampers inside the tower of an offshore wind turbine is investigated through simulations. Dampers are installed at the bottom to act on the curvature of the tower, and it is shown that dampers installed in suitable braces have the potential to increase the critical damping ratio of the two lowest tower modes by 1 percent. By using a toggle-brace system, damper stroke is increased, while the damper force is reduced. Finally, by installing the dampers in a symmetric configuration, tuning for maximum damping is approximately independent of the orientation of the rotor, thereby making this installation of dampers feasible.
Original languageEnglish
JournalEnergy Procedia
Volume53
Issue numberC
Pages (from-to)258-267
Number of pages10
ISSN1876-6102
DOIs
Publication statusPublished - 2014
EventEERA DeepWind 2014 - 11th Deep Sea Offshore Wind R&D Conference - Radisson Blu Royal Garden Hotel, Trondheim, Norway
Duration: 22 Jan 201424 Jan 2014
Conference number: 11
http://www.sintef.no/Projectweb/Deepwind_2014/

Conference

ConferenceEERA DeepWind 2014 - 11th Deep Sea Offshore Wind R&D Conference
Number11
LocationRadisson Blu Royal Garden Hotel
Country/TerritoryNorway
CityTrondheim
Period22/01/201424/01/2014
Internet address

Keywords

  • Stroke amplifying toggle brace
  • Passive damping
  • Fixed offshore wind turbine

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