Dynamic analysis of composite wind turbine blades as beams: an analytical and numerical study
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Published version
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Author(s)
Tufekci, Mertol
Genel, Omer Ekim
Tatar, Ali
Tufekci, Ekrem
Type
Journal Article
Abstract
This study focuses on the dynamic modelling and analysis of the wind turbine blades made of multiple layers of fibre reinforced composites and core materials. For this purpose, a novel three-dimensional analytical straight beam model for blades is formulated. This model assumes that the beam is made of functionally graded material (FGM) and has a variable and asymmetrical cross section. In this model, the blades are assumed to be thin, slender and long with a relatively straight axis. They have two main parts, namely the core and the shell. The so-called core consists of a lightweight isotropic foam material, which also adds significant damping to the system. The core material is covered by the shell, which is modelled using homogenous and orthotropic material assumptions as the structure is reinforced with continuous fibres. Therefore, the blades are modelled under a straight beam with varying cross-section assumptions, in which the effective elastic properties are acquired by homogenizing the cross section. The beam formulation for modelling the system is performed both analytically and numerically with the finite element method. The results of both methods are in well agreement. The maximum deviation between the results is found below 4%.
Date Issued
2021-03-01
Date Acceptance
2020-12-21
Citation
Vibration, 2021, 4 (1), pp.1-15
ISSN
2571-631X
Publisher
MDPI
Start Page
1
End Page
15
Journal / Book Title
Vibration
Volume
4
Issue
1
Copyright Statement
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This
article is an open access article distributed
under the terms and conditions of the
Creative Commons Attribution (CC BY)
license (https://creativecommons.org/licenses/by/4.0/).
article is an open access article distributed
under the terms and conditions of the
Creative Commons Attribution (CC BY)
license (https://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000677500100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Mechanical
Mechanics
Engineering
wind turbine
composite blades
modal analysis
analytical solution
finite element method
FINITE-ELEMENT
LAMINATED COMPOSITE
STRUCTURAL DESIGN
FREE-VIBRATIONS
MODEL
OPTIMIZATION
STRAIGHT
FATIGUE
MATRIX
SHEAR
Publication Status
Published
Date Publish Online
2020-12-24