Monitoring and Damage Detection in Structural Parts of Wind Turbines

Friedmann, A.; Mayer, Dirk; Koch, M.; Siebel, Thomas

doi:10.5772/21456

Cited by 7 publications

(7 citation statements)

References 33 publications

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“…The damping condition implies that since m and k are both symmetric, c is also symmetric. Furthermore, it is assumed that the analyzed systems are time-invariant, that is the system output does not depend on time (Friedmann et al, 2011).…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The types of equations which arise from modal analysis are those involve eigen systems. The physical interpretation of the Eigen values and eigenvectors which come from solving the system are that they represent the frequencies and corresponding mode shapes (Almohammadi et al, 2013; Friedmann et al, 2011). In this section, modal analysis of turbine blade is presented.…”

Section: Modal Analysismentioning

confidence: 99%

“…From an aerodynamic perspective, reduction in aerodynamic efficiency associated with an increase of the drag coefficient and environmental airborne solid particles. Also, an increasingly significant issue related with damaged blades is the level of perturbations and noise generated, because blade surface modifications may upsurge the level of sound noise generated by perturbing the boundary layer pattern (Almohammadi et al, 2013(Almohammadi et al, , 2015Du and Selig, 2000;Friedmann et al, 2011;Gaudern, 2014;Hameed et al, 2009;Hartwanger and Horvat, 2008). From a technological perspective, specialized surface coatings have been developed to assure a consistent aerodynamic performance and adequate structural integrity throughout the lifespan of a wind turbine.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of vertical axis wind turbine blade for off-shore applications

et al. 2022

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In this work, static and dynamic analyses are carried out on VAWT blade using analytical and numerical methods to figure out reasons behind the failure in the blade for off-shore applications arising due to turbulence of wind. The design flaws and different operating conditions play major role in failure of blades. Fatigue life cycles, natural frequencies of blade in different modes and turbine harmonic frequency have been calculated analytically using Goodman’s and vibration analysis theories respectively. In analysis, life cycles, natural frequencies and mode shapes for VAWT blade are studied. Analytical and numerical results have been compared, life cycles and frequencies are determined. The numerical results showed good agreement with theoretical concepts.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Modal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of vertical axis wind turbine blade for off-shore applications

et al. 2022

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“…Friedmann, et al [2] the paper applies a combination of different monitoring strategies to detect the health status of the wind turbines that are located onshore, the paper employs different types of wireless sensors to acquire the data and reduce the efforts of cabling for information transfer and analyses the data acquired to gain insights about its health status of WT, though the method seems to be cost effective the reliability in data transmission is still questionable.…”

Section: Literature Surveymentioning

confidence: 99%

March 2020

2020

JEEA

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The maintenance of Wind farms located in the off shores are highly challenging as the preservation and the operational availability are tedious. The insufficiency in the traditional system for monitoring the conditions of the wind turbines located in the off shores has made this topic an attractive area of research. The proposed method in the paper utilizes the multiple intelligent smart sensors to detect the impairments in the structure of the wind turbines. The sensors utilized in the proposed method estimates the damage index in the wind turbine by engaging the embedded software. The effectiveness of the proposed method was measured by applying it to the off shore wind turbines. The results obtained evinces the minimized cost and the down time in maintaining the off shore wind farms.

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“…Besides, large radial configuration of existing blades gives the rise to significant vibration problems due to a decrease in the spectrum of resonant frequencies. To prevent accidental situations, different methods of nondestructive testing and condition monitoring techniques are used [12], [13]. This requires additional time and financial resources.…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis and structural synthesis of wind energy production device with closed loop conveyor

Beresnevich¹,

Cerpinska²,

Vība³

et al. 2022

Vib. proced.

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This paper deals with a dual design device for wind energy production, in which the movement of the blade consists of several stages, that is, two stages of rotation about two fixed axes and two stages of the blades straight translation movement. The proposed design offers a closed-shaped flattened conveyor equipped with several identical flat-shaped blades. The blades are mounted on a conveyor belt and have an opportunity to move together with the belt in one straight line direction. Therefore, air flow kinetic energy is transformed into translation motion of flat blades. The conveyor system has a built-in energy generator. To analyse blade interaction with air flow, a superposition principle is applied, in which the fast chaotic motion of air particles (Brownian motion) is separated from the slow flow motion with the given average velocity. On the base of such separation, a differential equation of motion for the entire conveyor system with one degree of freedom is obtained. Dynamics of the system due to the action of air flow is simulated with computer program Mathcad. Optimization of system parameters is performed, using a generated power as criterion. In addition, motion control at changeable airflow is optimized by selecting the blade orientation and corresponding adjustment of generator.

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Monitoring and Damage Detection in Structural Parts of Wind Turbines

Cited by 7 publications

References 33 publications

Analysis of vertical axis wind turbine blade for off-shore applications

Analysis of vertical axis wind turbine blade for off-shore applications

March 2020

Dynamics analysis and structural synthesis of wind energy production device with closed loop conveyor

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