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Experimental modal analysis of aeroelastic tailored rotor blades in different boundary conditions

Gundlach, Janto and Govers, Yves (2019) Experimental modal analysis of aeroelastic tailored rotor blades in different boundary conditions. Journal of Physics: Conference Series, 1356 (012023). Institute of Physics (IOP) Publishing. doi: 10.1088/1742-6596/1356/1/012023. ISSN 1742-6588.

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Official URL: https://iopscience.iop.org/article/10.1088/1742-6596/1356/1/012023


In the present study results of a modal test campaign involving four identical rotor blades of 20 m length with geometric bend-twist coupling are reported. Design, realisation, and post-processing of the experiments have been carried out under careful consideration of a pre-existing FE shell model. Modal data is obtained at two different stages of the manufacturing process and for one blade in two separate boundary conditions, i.e. free-free in elastic suspensions and clamped to a test rig. Due to the high sensor density in both configurations, the identified normal modes do not only include coupled eigenforms but also mode shapes illustrating cross-sectional vibrations; the latter attributed to the deflection of the blade shells. The acquired dataset is found to be well-suited for the validation of the numerical model and representsa reliable basis for updating.

Item URL in elib:https://elib.dlr.de/134023/
Document Type:Article
Title:Experimental modal analysis of aeroelastic tailored rotor blades in different boundary conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gundlach, JantoJanto.Gundlach (at) dlr.dehttps://orcid.org/0000-0002-7933-4913
Govers, YvesYves.Govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Date:24 October 2019
Journal or Publication Title:Journal of Physics: Conference Series
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
DOI :10.1088/1742-6596/1356/1/012023
Publisher:Institute of Physics (IOP) Publishing
Keywords:Experimental modal analysis, rotor blades, bend-twist coupling
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Gundlach, Janto
Deposited On:24 Feb 2020 08:42
Last Modified:24 Feb 2020 08:42

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