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
Design and calibration of a semi-active control logic to mitigate structural vibrations in wind turbines
Journal ArticleDOI
A novel three dimensional nonlinear tuned mass damper and its application in floating offshore wind turbines
TL;DR: In this paper , a novel three-dimensional nonlinear tuned mass damper (3d-NTMD) is proposed to mitigate triaxial vibrations of a floating wind turbine.
Journal ArticleDOI
TMD stroke limiting influence on barge-type floating wind turbines
TL;DR: In this paper , a tuned mass damper (TMD) is applied to a barge-type floating offshore wind turbine (FOWT) to mitigate the impact of pendulum effect loads.
Journal ArticleDOI
Tuned liquid column damper for suppressing pitching motion of a floating rectangular box structure
Journal ArticleDOI
Reduction in the Fluctuating Load on Wind Turbines by Using a Combined Nacelle Acceleration Feedback and Lidar-Based Feedforward Control
TL;DR: In this paper, an advanced pitch controller is proposed for load mitigation of wind turbines, where the nacelle acceleration feedback control and lidar-based feedforward control are combined to reduce the load on wind turbines.
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.
Journal ArticleDOI
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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