Modal Analysis for Blade of Horizontal Axis Wind Turbine

Tenguria, Nitin; Mittal, N. D.; Ahmed, Siraj

doi:10.3923/ajsr.2011.326.334

Cited by 10 publications

(10 citation statements)

References 19 publications

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“…It has been stated (Tartibu et al, 2012) that only flap-wise natural frequencies are more likely to coincide with excitation frequency. It is indicated (Tenguria et al, 2011) that the natural frequencies are lower for the case of a single web spar structure. Numerous works (Kumar et al, 2014; Pabut et al, 2012) have performed vibration analysis on HAWT rotor blade using FEM method by ANSYS software, and validated the extracted natural frequencies with experimental results using fast Fourier transform (FFT) analyzer.…”

Section: Introductionmentioning

confidence: 99%

Investigation of stiffness of small wind turbine blade based on vibration analysis technique

Chandgude

Gadhave

Taware³

et al. 2019

Wind Engineering

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In this article, three small wind turbine blades of different materials were manufactured. Finite element analysis was carried out using finite element software ANSYS 14.5 on modeled blades of National Advisory Committee for Aeronautics 4412 airfoil profile. From finite element analysis, first, two flap-wise natural frequencies and mode shapes of three different blades are obtained. Experimental vibration analysis of manufactured blades was carried out using fast Fourier transform analyzer to find the first two flap-wise natural frequencies. Finally, the results obtained from the finite element analysis and experimental test of three blades are compared. Based on vibration analysis, we found that the natural frequency of glass fiber reinforced plastic blade reinforced with aluminum sheet metal (small) strips increases compared with the remaining blades. An increase in the natural frequency indicates an increase in the stiffness of blade.

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Section: Introductionmentioning

confidence: 99%

Investigation of stiffness of small wind turbine blade based on vibration analysis technique

Chandgude

Gadhave

Taware³

et al. 2019

Wind Engineering

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“…It is important to note that a high-cycle fatigue corresponds to failure after a relatively large number of load cycles, resulting in stress levels well below the generated material strength, exhibiting an elastic deformation. Furthermore, it is noteworthy that a structural member failure may not be attributed to the excess of load but to the repeated cycling loading [4,5,[19][20][21][22][23].…”

Section: Design Of Zero Head Turbines For Power Generationmentioning

confidence: 99%

“…As it is widely known, it must be highlighted that harmonic response analysis is a technique used to determine the steady-state response of a linear structure to loads that vary sinusoidally, i.e., harmonically, with time [20][21][22]. Harmonic response analysis gives the ability to predict the sustained dynamic behavior of structures; enabling, subsequently, to verify whether or not the designs will successfully overcome resonance, fatigue, and other harmful effects of forced vibrations.…”

Section: Design Of Zero Head Turbines For Power Generationmentioning

confidence: 99%

“…In general, higher stresses lead to a shorter fatigue life. For some materials, fatigue only occurs if stresses exceed a minimum level, while for other materials there is no minimal stress level [4,[19][20][21][22][23].…”

Section: Design Of Zero Head Turbines For Power Generationmentioning

confidence: 99%

“…Computer-generated models of the turbine blades can be very useful to investigate the turbine and turbine blade properties under running conditions. Therefore, the modal analysis of the blade was performed using also ANSYs Workbench to extract the natural frequencies and the dominant modes using block Lanczos method [19][20][21].…”

Section: Design Of Zero Head Turbines For Power Generationmentioning

confidence: 99%

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Design of Zero Head Turbines for Power Generation

Chica¹,

Rubio-Clemente²

2017

Renewable Hydropower Technologies

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Failure analysis of the blades of a horizontal axis hydrokinetic turbine of 1 kW is presented. Analysis consisted of the determination of the pressure on the blade surface using Computational Fluid Dynamics, and the calculation of the stress distribution in the blade due to hydrodynamic, inertial and gravitational loads using the finite element methods. The results indicate that the blade undergoes significant vibration and deflection during the operation, and the centrifugal and hydrodynamic loads considerably affect the structural response of the blade; however, the stresses produced in all of the analysed models did not exceed the safe working stresses of the materials used to manufacture the blade. Modal analysis was conducted to calculate first significant natural frequencies. Results were studied in depth against operating frequency of the turbine. After carrying out the modal analysis, harmonic analysis was also done to see the response of the turbine under dynamic loading. It was observed that the turbine is safe in its entire operating range as far as phenomenon of resonance is concerned. Additionally, it was observed that maximum harmonic response of the turbine on the application of dynamic loading is far lesser than its failure limit within the specified operating range.

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