Assessment of body-freedom flutter for an unmanned aerial vehicle

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”, i...

Full description

Saved in:
Bibliographic Details
Published in:CEAS aeronautical journal 2019-09, Vol.10 (3), p.845-857
Main Authors: Schäfer, D., Vidy, C., Mack, C., Arnold, J.
Format: Article
Language:English
Subjects:
Aerodynamics
Aerospace Technology and Astronautics
Configurations
Engineering
Euler-Lagrange equation
Flow theory
Flutter
Mach number
Nastran
Original Paper
Potential flow
Rigid structures
Stiffness
Unmanned aerial vehicles
Unsteady aerodynamics
Vibration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1869-5582
1869-5590
DOI:10.1007/s13272-018-0353-9