文档介绍：1
Engineering Structures 31 (2009) 358–368
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Engineering Structures
journal homepage: ate/engstruct
Tuned liquid column dampers in offshore wind turbines for structural control
Shane Colwell, Biswajit Basu ∗
Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Ireland
a r t i c l e i n f o a b s t r a c t
Article history: With offshore wind turbines ing larger, being moved out further at sea and subjected to ever
Received 19 June 2007 greater wind and wave forces, it is necessary to analyse the dynamics and minimise the responses of
Received in revised form these structures. In this paper, the structural responses of offshore wind turbines are simulated with an
20 July 2008
attached damper (Tuned Liquid Column Damper (TLCD)) for controlling the vibrations induced within the
Accepted 1 September 2008
structure. This requires a realistic simulation of the forces that these tall, flexible and slender structures
Available online 1 October 2008
are subjected to, and consequently the implementation of a damper to control the resulting undesirable
vibrations that are induced within the structure. Since sea waves are caused by wind blowing for a
Keywords:
TLCD sufficiently long time, the state of the sea is related to wind parameters and there exists the possibility
Offshore wind turbine of correlating wind and wave loading conditions on structures. The Kaimal spectrum for wind loading
Vibration control bined with the JONSWAP wave spectrum to formulate correlated wind and wave loadings. The
Wind loading offshore turbine tower is modelled as a Multi-Degree-of-Freedom (MDOF) structure. Cases for flat sea
Wave loading conditions, with which parallels to onshore wind turbines may be drawn, are first simulated. Simulations
Correlation are presented for the MDOF structure subjected to both ‘moderate’ and ‘strong’ wind and wave loadings.
Cases of the blades lumped at the na