Development of a high fidelity finite element model of a wind turbine blade via modal testing

Amer, Chadi
The design of an optimised horizontal axis 5-meter-long wind turbine rotor blade, is a research and development project, in order to fulfil the requirements of high efficiency torque-from-wind production. For this purpose, a research study is presented here, by investigating the structural characteristics of a composite wind turbine blade via finite element modelling and experimental modal analysis. At first, modal tests are performed by using various sensor-actuator pair combinations. After that the geometry was drawn via CATIA software. The materials are assigned as; two different types of glass fabrics, polymeric foam core material and steel-balsa wood combination and the finite element model of the blade was generated via MSC© PATRAN software with various meshes created on each structural part of the blade. MSC© NASTRAN was used as a solver for the dynamic analyses in order to obtain the natural frequencies and the corresponding mode shapes, namely; the first three out-of-plane bending, the first in-plane bending and the first torsional ones. Mesh independency check is also made before the analyses. In all analyses, the blade’s boundary conditions are set as free-free and fixed-free. Finally, the experimental modal analysis results are used to update the low fidelity model via FEMTools software in order to obtain a high fidelity finite element model of the wind turbine blade.


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Oğuz, Keriman; Sezer Uzol, Nilay; Department of Aerospace Engineering (2019)
In this thesis, an aerodynamic design and optimization study for rotor airfoils and blades of Horizontal Axis Wind Turbines (HAWTs) is performed by using different airfoil representations and genetic algorithm. Two airfoil representations, the Class-Shape Transformation (CST) method and the Parametric Section (PARSEC) method, are used for the airfoil geometry designs. Their aerodynamic data is obtained by a potential flow solver software, XFOIL. The Blade Element Momentum (BEM) theory is used to calculate t...
Citation Formats
C. Amer, “Development of a high fidelity finite element model of a wind turbine blade via modal testing,” M.S. - Master of Science, Middle East Technical University, 2015.