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Stability and LCO Amplitude Prediction for Aeroelastic Systems with Aerodynamic and Structural Nonlinearities Using Numerical Continuation
Vio, Gareth Arthur; Dimitriadis, Grigorios; Cooper, Jonathan Edward
2005In RTO-MP-AVT-123 Flow-Induced Unsteady Loads and the Impact on Military Applications
 

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Keywords :
Nonlinear Aeroelastic Systems; Limit Cycle Oscillations; Numerical Continuation
Abstract :
[en] This paper deals with the prediction of stability boundaries and Limit Cycle Oscillation amplitudes for aeroelastic systems with nonlinear unsteady aerodynamic loads and/or nonlinearity in the structure. The Numerical Continuation method is used to accurately predict bifurcation conditions and LCO amplitudes for aeroelastic systems with various types of nonlinearity without the need for extensive CFD calculations. It is shown that it is possible to completely characterise the stability of systems undergoing subcritical and supercritical bifurcations. The method is applied to a pitch-plunge airfoil subjected to transonic aerodynamics and freeplay structural nonlinearity. The results from this analysis are compared to those obtained from full numerical simulation to ensure their accuracy.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Vio, Gareth Arthur;  University of Manchester > School of Engineering
Dimitriadis, Grigorios ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Cooper, Jonathan Edward;  University of Manchester > School of Engineering
Language :
English
Title :
Stability and LCO Amplitude Prediction for Aeroelastic Systems with Aerodynamic and Structural Nonlinearities Using Numerical Continuation
Publication date :
April 2005
Event name :
AVT-123 RTO Applied Vehicle Technology Panel (AVT) Symposium
Event organizer :
NATO Research and Technology Organisation
Event place :
Budapest, Hungary
Event date :
du 25 avril au 28 avril 2005
Audience :
International
Main work title :
RTO-MP-AVT-123 Flow-Induced Unsteady Loads and the Impact on Military Applications
Main work alternative title :
[en] Charges instables induites par écoulement et impact sur les applications militaires
Publisher :
NATO Research and Technology Organisation, Neuilly-sur-Seine, France
Edition :
RTO-MP-AVT-123 AC/323(AVT-123)TP/92
Pages :
27-1 - 27-14, Paper 27
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since 30 September 2009

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