[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