Targeted energy transfer; aeroelastic instability suppression
Abstract :
[en] We study passive and nonlinear targeted energy transfers induced by transient resonant interactions between an essentially nonlinear attachment and an in-flow rigid wing model. We show that it is feasible to partially or even completely suppress aeroelastic instabilities in the wing (limit cycle oscillations-LCOs) by passively transferring broadband vibration energy from the wing to the attachment in a one-way irreversible fashion. We study the nonlinear dynamical mechanisms that govern TET and show that they are series of transient or sustained resonance captures in different resonance manifolds of the dynamics. Aeroelastic instability suppression
is performed by partially or completely eliminating the triggering mechanism for aeroelastic instability. Through numerical parametric studies we identify three main mechanisms for suppressing aeroelastic instability, and investigate them in detail, both numerically by Empirical Mode decomposition (EMD), and analytically by slow/fast partitions of the transient dynamics.
Disciplines :
Physics Mechanical engineering Mathematics
Author, co-author :
Lee, Young S.; University of Illinois at Urbana-Champaign > Department of Aerospace Engineering
McFarland, D. Michael; University of Illinois at Urbana-Champaign > Department of Aerospace Engineering
Vakakis, Alexander F.; National Technical University of Athens > Department of Mechanical and Industrial Engineering
Bergman, Lawrence A.; University of Illinois at Urbana-Champaign > Department of Aerospace Engineering
Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Language :
English
Title :
SUPPRESSION OF AEROELASTIC INSTABILITIES BY BROADBAND PASSIVE TARGETED ENERGY TRANSFERS
Publication date :
July 2008
Event name :
Sixth EUROMECH Nonlinear Dynamics Conference
Event place :
Saint-Petersburg, Russia
Event date :
1-4 July 2008
Audience :
International
Main work title :
Sixth EUROMECH Nonlinear Dynamics Conference, Saint Petersbourg, 2008
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