Title:	Numerical modal analysis of DTU 10-MW reference wind turbine’s blade using modified Myklestad´s method
Authors:	Meirelles Pereira, Lucas Santana Alves, Marco Tulio
Citation:	Applied and Computational Mechanics. 2022, vol. 16, no. 1, p. 51-63.
Issue Date:	2022
Publisher:	University of West Bohemia
Document type:	článek article
URI:	https://www.kme.zcu.cz/acm/acm/issue/view/31 http://hdl.handle.net/11025/49232
ISSN:	1802-680X (Print) 2336-1182 (Online)
Keywords:	Myklestadova metoda;modální analýza;strukturální dynamika;větrná energie
Keywords in different language:	Myklestad method;modal analysis;structural dynamics;wind energy
Abstract in different language:	Since the rotor blade system of an horizontal axis wind turbine is responsible for converting wind energy into mechanical, which turns into electrical and predicting its dynamic behavior is of vital importance. In that sense, this paper deals with performing a modal analysis of a blade belonging to the DTU 10-MW reference wind turbine by using a modified Myklestad’s method. The blade model was built on two different keystones, as follows: first, considering uncoupled bending in out-of-plane (flapwise) and in-plane (edgewise) directions and considering a coupled bending-torsion motion also in both directions. In order to accomplish these objectives, a Python code was implemented. The computed eigenfrequencies were compared to the results obtained for the blade by using the finite element method. Besides, the mode shapes were plotted and the centrifugal stiffening was also taken into account. Results suggest the feasibility of the modified Myklestad’s method for modal analysis purposes, since good agreement with reference data was achieved and considering that the Myklestad’s method has a considerably less complex implementation than the finite element method.
Rights:	© University of West Bohemia
Appears in Collections:	Volume 16, number 1 (2022) Volume 16, number 1 (2022)

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