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  •   Open Research
  • AUT Faculties
  • Faculty of Design and Creative Technologies (Te Ara Auaha)
  • School of Engineering, Computer and Mathematical Sciences - Te Kura Mātai Pūhanga, Rorohiko, Pāngarau
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Vibration analysis of a variable length blade wind turbine

Tartibu, LK; Kilfoil, M; Van Der Merwe, AJ
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IJAET 1 2012.pdf (920.7Kb)
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http://hdl.handle.net/10292/4760
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Abstract
In this paper, flap-wise, edge-wise and torsional natural frequencies of a variable length blade have been identified. Therefore designers can ensure that natural frequencies will not be close to the frequency of the main excitation forces in order to avoid resonance. The fixed portion and moveable portion of the variable length blade are approximated respectively by a hollow and a solid beam which can be slid in and out. Ten different configurations of the variable length blade, representing ten different positions of the moveable portion are investigated. A MATLAB program was developed to predict natural frequencies. Similarly three-dimensional models of the variable length blade have been developed in the finite element program Unigraphics NX5. Concurrence between MATLAB and Unigraphics NX5 results has been found for the frequency range of interest. This means that an effective method to compute natural frequencies of a variable length blade was developed.
Keywords
Variable length blade; Natural frequencies; Vibration; Finite element analysis; Wind turbine
Date
July 2012
Source
International Journal of Advances in Engineering & Technology, vol.4(1), pp.630 - 639 (10)
Item Type
Journal Article
Publisher
IJAET
Publisher's Version
http://www.archives-ijaet.org/media/62I9-VIBRATION-ANALYSIS.pdf
Rights Statement
International Journal of Advances in Engineering & Technology - IJAET is an Open Access journal.

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