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Non-Linear Aeroelasticity - Time and Frequency Domain

Kießling, F. and Schulze, S. (2000) Non-Linear Aeroelasticity - Time and Frequency Domain. 2nd ONERA-DLR Symposium, Berlin, Germany, 15-16 June 2000.

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Flutter of aeroelastic systems with discrete structural nonlinearities is computed in the time domain and compared with frequency domain results. The simulation approach is based on the coupling of the discretized fluid and structural equations. Embedded in an effective procedure to determine complete flutter boundaries (bifurcation diagrams), the method is employed to investigate the flutter stability of an airfoil with a trailing edge flap for hardening and softening stiffness characteristics in the control mechanism. For comparison the aerodynamic forces are determined by the classical linear unsteady thin airfoil theory for incompressible inviscid flow and by a CFD method to solve the Euler equations. The typical flutter behavior of the system is described and explained by comparing it with the flutter properties of a linear reference model. The results validate the simulation method and provide a deeper insight into the nonlinear flutter mechanisms of airfoils with control surfaces.

Item URL in elib:https://elib.dlr.de/14521/
Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Non-Linear Aeroelasticity - Time and Frequency Domain
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 70-82
Keywords:Flattern, Flügel/Ruder-System, Strömungs-Struktur-Kopplung, Euler-Gleichungen
Event Title:2nd ONERA-DLR Symposium, Berlin, Germany, 15-16 June 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):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:57

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