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Robust flutter analysis using interval modal analysis and continuation method

Schwochow, Jan (2009) Robust flutter analysis using interval modal analysis and continuation method. IFASD 2009 - International Forum on Aeroelasticity and Structural Dynamics, 21-25 June 2009, Seattle, WA (USA).

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For robust analysis of the flutter stability, it is necessary to consider the uncertainties of the structural dynamics model. These uncertainties can be clarified from estimates of uncertainties of the parameters in finite element models or from statistical evaluations of experiments. As a supplement to the reliable flutter algorithm for solution of the flutter equation, the continuation method is introduced, which allows the specific examination of individual solution branches of the flutter equations that risk being critical for stability. To compute the range of variations of eigenfrequencies and mode shapes caused by possible structural uncertainties, the interval modal analysis is introduced. The modal interval ranges are tracked through the flutter stability analysis. The deterministic computed intervals of critical flutter speeds are compared to the probabilistic results obtained by Monte-Carlosimulation.

Item URL in elib:https://elib.dlr.de/62049/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Robust flutter analysis using interval modal analysis and continuation method
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:robust flutter analysis, interval modal analysis, interval flutter analysis, uncertainty propagation, Monte-Carlo-simulation, continuation method
Event Title:IFASD 2009 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Seattle, WA (USA)
Event Type:international Conference
Event Dates:21-25 June 2009
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:28 Jan 2010 15:49
Last Modified:28 Jan 2010 15:49

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