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Adaptive Vibration Damping of Fin-Structures.

Stüwing, M. and Büter, A. and Sachau, A. and Breitbach, E. (2000) Adaptive Vibration Damping of Fin-Structures. In: CD: ICSV 7, 7th International Congress on Sound and Vibration, Vol 1, pp. 155-162. Kramer Technology Publishing. ICSV 7, 7th International Congress on Sound and Vibration, Garmisch-Partenkirchen, Germany, July 2000.

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Abstract

One major problem of modem military aircraft is the buffet loading on the fin structures. Flying the aircraft at high angles of attack allows vortices, evolving from the leading edge of the wing, to hit the fin and excite struc-tural vibrations. This leads to increased fatigue loads as well as reduced aircraft manoeuvrability and flight enve-lope. In this paper an adaptive structural system is presented, that has been developed with the aim of reducing these fin vibrations. The adaptive system uses an ACTIVE INTERFACE to dynamically introduce counteracting forces that cancel out the aerodynamically induced vibrational loads. This interface concept is based upon the integration of piezoelectric elements directly into the bending support of the fin structure. Therefore, the piezoelectric materials were extensively tested in order to characterise their performance under the expected very high load levels. sub-sequently, a FE-model of the fin structure was investigated, mode shapes and eigenfrequencies were extracted. The active interface was designed and manufactured and it was finally integrated into a full scale testing structure. Tested under realistic loading conditions, it proved to have the necessary authority over the aerodynamic vibration loads. The results of these investigations will be given in this presentation.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Adaptive Vibration Damping of Fin-Structures.
Authors:
AuthorsInstitution or Email of Authors
Stüwing, M.UNSPECIFIED
Büter, A.UNSPECIFIED
Sachau, A.UNSPECIFIED
Breitbach, E.UNSPECIFIED
Date:2000
Journal or Publication Title:CD: ICSV 7, 7th International Congress on Sound and Vibration
Volume:Vol 1
Page Range:pp. 155-162
Editors:
EditorsEmail
International Institute of Acoustics and Vibration, UNSPECIFIED
Publisher:Kramer Technology Publishing
Status:Published
Event Title:ICSV 7, 7th International Congress on Sound and Vibration, Garmisch-Partenkirchen, Germany, July 2000
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Institut für Strukturmechanik
Deposited By: Sibylle Wolff
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 16:03

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