Journal ArticleDOI
Passive control of floating offshore wind turbine nacelle and spar vibrations by multiple tuned mass dampers
Van Nguyen Dinh,Biswajit Basu +1 more
TLDR
In this article, the use of single and multiple tuned mass dampers (TMDs) for passive control of edgewise vibrations of nacelle/tower and spar of spar-type floating wind turbines (S-FOWTs) is investigated.Abstract:
SUMMARY
This paper investigates the use of single and multiple tuned mass dampers (TMDs) for passive control of edgewise vibrations of nacelle/tower and spar of spar-type floating wind turbines (S-FOWTs). Uncontrolled and controlled mathematical models of the S-FOWT are developed by using Euler-Lagrangian energy formulations. In these models, the aerodynamic properties of the blade, variable mass and stiffness, gravity, the interactions among the blades, nacelle, spar and mooring system, the hydrodynamic effects, the restoring moment, and the buoyancy force are considered. The vibrations of the blades, nacelle, tower, and spar are coupled in all degrees of freedom and in all inertial, dissipative, and elastic components. In the controlled model, several set of horizontal TMDs are placed in the spar at various depths and the coupling of these TMDs with the nacelle and spar motions is considered. The control effectiveness is evaluated by the reduction of the root-mean-square and maximum response. The control feasibility is examined by using the spar sinking and the TMD maximum strokes. The investigations using nonlinear time–domain simulation show that a single TMD can reduce up to 40% of the nacelle sway displacement and the spar roll, and that the reduction observed with multiple TMDs is 50%. The influence of the spar TMD is more significant than that of the nacelle TMD. The spar TMDs are less effective when their positions are lower. In all the cases studied, good heave performance of the S-FOWT is maintained. Copyright © 2014 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Review of Vibration Control Methods for Wind Turbines
TL;DR: This paper aims to present in detail the problems associated with wind turbine vibration and a thorough literature review of the different mitigation solutions, and explores the advantages, drawbacks, and challenges of the existing vibration control systems for wind turbines.
Journal ArticleDOI
Applying multiple tuned mass dampers to control structural loads of bottom-fixed offshore wind turbines with inclusion of soil-structure interaction
TL;DR: In this article, the structural responses of a bottom-fixed offshore wind turbine that suffers combined wind and wave excitations are explored, and the vibration mitigation effects of a single tuned mass damper (STMD) and a multiple TMDs (MTMD) system are examined.
Journal ArticleDOI
Semi-Active Structural Control of Offshore Wind Turbines Considering Damage Development
Arash Hemmati,Erkan Oterkus +1 more
TL;DR: In this article, a model for offshore wind turbine systems equipped with a semi-active time-variant tuned mass damper is developed considering nonlinear soil-pile interaction phenomenon and time-varying damage conditions.
Journal ArticleDOI
Enhanced hybrid active tuned mass dampers for structures
Liyuan Cao,Chunxiang Li +1 more
TL;DR: Results of analysis have demonstrated that EHATMD outperforms HAT MD and thereby may be regarded as a novel extension of HATMD.
Journal ArticleDOI
Hybrid damper with stroke amplification for damping of offshore wind turbines
TL;DR: In this paper, a novel control concept for the damping of tower vibrations is proposed, where viscous type hybrid dampers are installed at the bottom of the wind turbine tower, where a passive viscous dashpot is placed in series with a load cell and an active actuator.
References
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ReportDOI
Definition of a 5-MW Reference Wind Turbine for Offshore System Development
TL;DR: In this article, a three-bladed, upwind, variable speed, variable blade-pitch-to-feather-controlled multimegawatt wind turbine model developed by NREL to support concept studies aimed at assessing offshore wind technology is described.
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TL;DR: In this paper, linear-wave induced motions and loads on floating structures were modeled as Second-order nonlinear problems. But the authors did not consider the effects of the wind and current on the floating structures.
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State of the art of structural control
TL;DR: In this paper, the authors review the recent and rapid developments in semi-active structural control and its implementation in full-scale structures, and present an alternative to active and hybrid control for structural vibration reduction.
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