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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 (2016) Assessment of Body-Freedom Flutter for an Unmanned Aerial Vehicle. Deutscher Luft- und Raumfahrt Kongress 2016, 13.-15. Sept. 2016, Braunschweig, Deutschland.

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The flutter characteristic of a highly swept flying wing unmanned aerial vehicle (UAV) is studied for the DLR-F19 concept. The compact geometry, based on the SACCON configuration, raises the question whether a coupling between rigid-body and elastic modes, known as “Body-Freedom Flutter” (BFF), 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 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/106600/
Document Type:Conference or Workshop Item (Speech)
Title:Assessment of Body-Freedom Flutter for an Unmanned Aerial Vehicle
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
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:aeroelasticity, flutter, Body-Freedom Flutter, Lambda-Konfiguration
Event Title:Deutscher Luft- und Raumfahrt Kongress 2016
Event Location:Braunschweig, Deutschland
Event Type:national Conference
Event Dates:13.-15. Sept. 2016
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
Deposited By: Schäfer, Dominik
Deposited On:28 Nov 2016 15:30
Last Modified:28 Nov 2016 15:30

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