Decision letter for "Optimal design of passive‐adaptive pendulum tuned mass damper for the global vibration control of offshore wind turbines"

2020 ◽  
Keyword(s):  
Optimal Design ◽  
Vibration Control ◽  
Wind Turbines ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
Mass Damper

scholarly journals Optimal design of passive‐adaptive pendulum tuned mass damper for the global vibration control of offshore wind turbines

Wind Energy ◽  
2020 ◽  
Author(s):  
Gino Bertollucci Colherinhas ◽  
Francesco Petrini ◽  
Marcus Vinícius Girão Morais ◽  
Franco Bontempi
Keyword(s):  
Optimal Design ◽  
Vibration Control ◽  
Wind Turbines ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
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%.

Vibration mitigation in offshore wind turbines via tuned mass damper

2019 ◽  
Vol 183 ◽  
pp. 610-636 ◽  
Author(s):  
Mina Ghassempour ◽  
Giuseppe Failla ◽  
Felice Arena
Keyword(s):  
Wind Turbines ◽  
Tuned Mass Damper ◽  
Offshore Wind ◽  
Vibration Mitigation ◽  
Offshore Wind Turbines ◽  
Mass Damper
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