Investigation and optimization of a pre‐stressed tuned mass damper for wind turbine tower

2021 ◽  
Author(s):  
Gang Liu ◽  
Zhenbo Lei ◽  
Hui Wang
Keyword(s):  
Wind Turbine ◽  
Tuned Mass Damper ◽  
Wind Turbine Tower ◽  
Mass Damper

Dynamic Similarity of Wind Turbine's Tower-Nacelle System and its Scaled Model

2013 ◽  
Vol 208 ◽  
pp. 29-39 ◽  
Author(s):  
Jacek Snamina ◽  
Paweł Martynowicz ◽  
Waldemar Łatas
Keyword(s):  
Wind Turbine ◽  
Real World ◽  
Tuned Mass Damper ◽  
Similarity Criteria ◽  
Laboratory Model ◽  
Model Parameters ◽  
Scaled Model ◽  
Partial Similarity ◽  
Dynamic Similarity ◽  
Mass Damper

A paper presents analysis of dynamic similarity between full-scale wind turbines tower-nacelle system and its laboratory model. As a reference real-world structure, Vensys 82 wind turbine was assumed. Complete and partial similarity criteria were both introduced. Considering laboratory model to be equipped with tuned mass damper horizontally arranged at the top, partial similarity of one pair of points (tower tips) motions will be satisfactory. On the basis of similarity conditions, laboratory model parameters were determined so that data acquired for the model may be referred to real-world structure.

scholarly journals Analysis of Load Reduction of Floating Wind Turbines Using Passive Tuned Mass Dampers

2021 ◽  
Vol 9 (9) ◽  
pp. 1340-1345
Author(s):  
Aabas Ahmad
Keyword(s):  
Standard Deviation ◽  
Wind Turbine ◽  
Tuned Mass Damper ◽  
Mass Ratio ◽  
Longitudinal Displacement ◽  
Wave Load ◽  
Tuned Mass Dampers ◽  
Floating Wind Turbine ◽  
Mass Damper ◽  
Offshore Floating Wind Turbine

Abstract: An efficient method for restraining the large vibration displacements and loads of offshore floating wind turbines under harsh marine environment is proposed by putting tuned mass dampers in the cabin. A dynamics model for a barge-type offshore floating wind turbine with a fore–aft tuned mass damper is established based on Lagrange’s equations; the nonlinear least squares Leven berg–Marquardt algorithm is employed to identify the parameters of the wind turbine; different parameter optimization methods are adopted to optimize tuned mass damper parameters by considering the standard deviation of the tower top longitudinal displacement as the objective function. Aiming at five typical combined wind and wave load cases under normal running state of the wind turbine, the dynamic responses of the wind turbine with/without tuned mass damper are simulated and the suppression effect of the tuned mass damper is investigated over the wide range of load cases. The results show that when the wind turbine vibrates in the state of damped free vibration, the standard deviation of the tower top longitudinal displacement is decreased approximately 60% in 100 s by the optimized tuned mass damper with the optimum tuned mass damper mass ratio 1.8%. The standard deviation suppression rates of the longitudinal displacements and loads in the tower and blades increase with the tuned mass damper mass ratio when the wind turbine vibrates under the combined wind and wave load cases. When the mass ratio changes from 0.5% to 2%, the maximum suppression rates vary from 20% to 50% correspondingly, which effectively reduce vibration responses of the offshore floating wind turbine. The results of this article preliminarily verify the feasibilities of using a tuned mass damper for restraining vibration of the barge-type offshore floating wind turbine

The effect of tuned mass damper to the vibration of wind turbine structure model

2019 ◽  
Author(s):  
Harus Laksana Guntur ◽  
Wiwiek Hendrowati ◽  
Aida Daman ◽  
Auliana Diah Wilujeng
Keyword(s):  
Wind Turbine ◽  
Tuned Mass Damper ◽  
Structure Model ◽  
Mass Damper

scholarly journals Semi-Active Structural Control of Offshore Wind Turbines Considering Damage Development

2018 ◽  
Vol 6 (3) ◽  
pp. 102 ◽  
Author(s):  
Arash Hemmati ◽  
Erkan Oterkus
Keyword(s):  
Wind Turbine ◽  
Structural Properties ◽  
Wind Turbines ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Mass Ratio ◽  
Damage Development ◽  
Active Time ◽  
Offshore Wind Turbines ◽  
Mass Damper

High flexibility of new offshore wind turbines (OWT) makes them vulnerable since they are subjected to large environmental loadings, wind turbine excitations and seismic loadings. A control system capable of mitigating undesired vibrations with the potential of modifying its structural properties depending on time-variant loadings and damage development can effectively enhance serviceability and fatigue lifetime of turbine systems. In the present paper, 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-variant damage conditions. The adaptive concept of this tuned mass damper assumes slow change in its structural properties. Stochastic wind and wave loadings in conjunction with ground motions are applied to the system. Damages to soil and tower caused by earthquake strokes are considered and the semi-active control device is retuned to the instantaneous frequency of the system using short-time Fourier transformation (STFT). The performance of semi-active time-variant vibration control is compared with its passive counterpart in operational and parked conditions. The dynamic responses for a single seismic record and a set of seismic records are presented. The results show that a semi-active mass damper with a mass ratio of 1% performs significantly better than a passive tuned mass damper with a mass ratio of 4%.

scholarly journals Active tuned mass damper for damping of offshore wind turbine vibrations

Wind Energy ◽  
2016 ◽  
Vol 20 (5) ◽  
pp. 783-796 ◽  
Author(s):  
Mark L. Brodersen ◽  
Ann-Sofie Bjørke ◽  
Jan Høgsberg
Keyword(s):  
Wind Turbine ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Mass Damper
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