Vibration control in wind turbines for performance enhancement: A comparative study

Rezaee, Milad; Aly, Aly Mousaad

doi:10.12989/was.2016.22.1.107

Cited by 19 publications

(22 citation statements)

References 43 publications

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“…e structure considered in this study is a 76-story benchmark building, which is very sensitive to wind [33][34][35][36]. Detailed information of the building can be found in reference [33,35].…”

Section: Benchmark Building With/without Tmdsmentioning

confidence: 99%

“…Chapain and Aly [32] reported that viscous dampers showed their potential to enhance dynamic performance of buildings under multiple hazards. Earlier to this, Rezaee and Aly [33,34] reported that semiactive controllers were quite effective in vibration mitigation of a wind turbine subjected to multiple hazards.…”

Section: Introductionmentioning

confidence: 95%

“…Consideration of multihazard performance is therefore important, especially for very tall and other structures which are sensitive to wind. A few studies have presented performance of buildings with/without vibration controller devices under both wind and earthquake excitations [25][26][27][28][29][30][31][32][33][34]. ese studies show that while earthquake ground motions cause large floor acceleration demand, wind forces induce large interstory drift demands in tall buildings.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

Elias

Rupakhety

Ólafsson

2019

Shock and Vibration

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This study presents analysis of a benchmark building installed with tuned mass dampers (TMDs) while subjected to wind and earthquake loads. Different TMD schemes are applied to reduce dynamic responses of the building under wind and earthquakes. The coupled equations of motion are formulated and solved using numerical methods. The uncontrolled building (NC) and the controlled building are subjected to a set of 100 earthquake ground motions and wind forces. The effectiveness of using different multiple TMD (MTMD) schemes as opposed to single TMD (STMD) is presented. Optimal TMD parameters and their location are investigated. For a tall structure like the one studied here, TMDs are found to be more effective in controlling acceleration response than displacement, when subjected to wind forces. It is observed that MTMDs with equal stiffness in each of the TMDs (usually considered for wind response control), when optimized for a given structure, are effective in controlling acceleration response under both wind and earthquake forces. However, if the device is designed with equal mass in every floor, it is less effective in controlling wind-induced floor acceleration. Therefore, when it comes to multihazard response control, distributed TMDs with equal stiffnesses should be preferred over those with equal masses.

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Section: Benchmark Building With/without Tmdsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

Elias

Rupakhety

Ólafsson

2019

Shock and Vibration

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“…In fact, providing researchers with data on wind turbine design and performance would allow wind turbines to be optimized . Future research will focus on the control of the response of the wind turbine using potential active and semi active techniques, similar to those used for the control of buildings under wind and earthquake loads (; Rezaee and Aly ).…”

Section: Effects Of Base Dynamics On Foundation Loadsmentioning

confidence: 99%

On the evaluation of wind loads for wind turbines' foundation design: Experimental and numerical investigations

Abdelkader

Aly

Rezaee

et al. 2017

Struct Design Tall Spec Build

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Summary In the past two decades, wind farms have been enjoying renewed interest as means for clean and renewable energy production. Larger and taller wind turbines are used for harvesting wind energy. In this paper, a boundary‐layer wind tunnel experiment was carried out on a model of the 5‐MW National Renewable Energy Laboratory (NREL) wind turbine, to evaluate overall wind‐induced base loadings in a parked condition. While mean and background base loadings were measured experimentally, a posttest dynamic analysis framework is developed to assess inertial loads analytically. The analytical analysis is carried out under both rigid and flexible tower‐foundation assumptions. Whenever applicable, the wind tunnel measurements are compared with NREL results, which were obtained by using the Fatigue, Aerodynamics, Structures, and Turbulence (FAST) software. The comparison shows a good agreement between the proposed approach and the available FAST results. In addition, the study indicates that the flexibility of the foundation may result in a reduced overall wind loads, due to base isolation effects. However, the assumption of a rigid foundation results in a slightly conservative base loads. This said, depending on the available foundation system, the methodology followed in the current paper remains in force and the base stiffness can be updated to permit the estimation of actual foundation loadings.

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“…On the other hand, classical control strategies are also included in the numerical studies such as linear quadratic regulator (LQR) feedback control [12] and linear quadratic Gaussian (LQG) algorithm which are effective when applied to the small and linearly behaving structures. The passive control systems such as a tuned mass damper, a tuned liquid damper (TLD), a tuned liquid column damper (TLCD), and tuned mass dampers (TMDs) were used to mitigate the vibrations of various structures caused by dynamic loadings [13][14][15][16]. In the tuned mass damper system a mass is attached to a building structure with a spring and a dashpot.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Performance of Two Passive Controllers in Mitigating the Rotational Response of Irregular Buildings

Bigdeli

Kim

2016

Advances in Materials Science and Engineering

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Two passive vibration control devices (i.e., circle type tuned liquid damper (C-TLD) and a circle type tuned liquid column damper (C-TLCD)) were experimentally investigated for their performance when attached to the irregular building structure subjected to dynamic loads. The specific directions where the maximum response of the structure is expected were experimentally identified for x- and y-directions as well as for rotational direction. The power spectral density (PSD) was computed for the response of the structure based on the frequency of the first three modes and also water level changes in the device container by using fast Fourier transform (FFT). The performances of these two controllers regarding suppressing the structural vibration were compared for the seismic loads applied in an experimentally identified critical direction. The results show that these systems are effective in terms of mitigating the coupled lateral and torsional vibrations of a scaled three-story irregular model.

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Vibration control in wind turbines for performance enhancement: A comparative study

Cited by 19 publications

References 43 publications

Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

On the evaluation of wind loads for wind turbines' foundation design: Experimental and numerical investigations

Investigation of the Performance of Two Passive Controllers in Mitigating the Rotational Response of Irregular Buildings

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