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Assessment of body-freedom flutter for an unmanned aerial vehicle

Schäfer, Dominik and Vidy, Cyrille and Mack, Christoph and Arnold, Jürgen (2018) Assessment of body-freedom flutter for an unmanned aerial vehicle. CEAS Aeronautical Journal. Springer. DOI: https://doi.org/10.1007/s13272-018-0353-9 ISSN 1869-5590

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Abstract

The flutter characteristic of a highly swept flying wing unmanned aerial vehicle (UAV) is studied for the DLR-F19 concept. The compact geometry, which is based on the SACCON configuration, raises the question whether a coupling between rigid body and elastic modes, known as “body-freedom flutter”, is relevant for this configuration to be a critical flutter phenomenon. The important modes contributing to the various flutter mechanisms are identified by means of the average power of the modal unsteady aerodynamics. Furthermore, aerodynamic methods based on linear potential flow theory (MSC.Nastran DLM and ZAERO ZONA6) and the Euler equations are used to assess the accuracy of fast aerodynamic methods for flutter point prediction of this particular configuration at a low transonic Mach number of 0.8. The BFF phenomenon is further examined by modifying the mass and stiffness distributions of the configuration.

Item URL in elib:https://elib.dlr.de/125901/
Document Type:Article
Title:Assessment of body-freedom flutter for an unmanned aerial vehicle
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schäfer, DominikD.Schaefer (at) dlr.deUNSPECIFIED
Vidy, CyrilleAirbus Defence and SpaceUNSPECIFIED
Mack, ChristophAirbus Defence and SpaceUNSPECIFIED
Arnold, Jürgenjuergen.arnold (at) dlr.deUNSPECIFIED
Date:December 2018
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :https://doi.org/10.1007/s13272-018-0353-9
Publisher:Springer
ISSN:1869-5590
Status:Published
Keywords:aeroelasticity, body-freedom flutter, potential flow theory, Euler method, flying wing combat UAV
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Arnold, Dipl.-Ing. Jürgen
Deposited On:14 Jan 2019 10:56
Last Modified:25 Jan 2019 15:21

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