Article (Scientific journals)
Suppressing aeroelastic instability by means of broadband passive TET, part 1, theory
Lee, Y.; Vakakis, Alexander F.; Bergman, L. A. et al.
2007In AIAA Journal, 45, p. 693-711
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Keywords :
Aeroelastic Instability; Broadband Passive; Targeted Energy Transfers
Abstract :
[en] We study passive and nonlinear targeted energy transfers induced by resonant interactions between a singledegree- of-freedom nonlinear energy sink (NES) and a 2-DOF in-flow rigid wing model. We show that it is feasible to partially or even completely suppress aeroelastic instability by passively transferring vibration energy from the wing to the NES in a one-way irreversible fashion. Moreover, this instability suppression is performed by partially or completely eliminating its triggering mechanism. Numerical parametric studies identify three main mechanisms for suppressing aeroelastic instability: recurring burstout and suppression, intermediate suppression, and complete elimination.Weinvestigate these mechanisms both numerically by the Hilbert–Huang transform and analytically by a complexification-averaging technique. Each suppression mechanism involves strong 1:1 resonance capture during which the NES absorbs and dissipates a significant portion of energy fed from the flow to the wing. Failure of suppression is associated with restoring the underlying triggering mechanism of instability, which is a series of superharmonic resonance captures followed by escapes from resonance. Finally, using a numerical continuation technique, we perform a bifurcation analysis to examine sensitive dependence on initial conditions and thus robustness of instability suppression.
Disciplines :
Physics
Mechanical engineering
Electrical & electronics engineering
Author, co-author :
Lee, Y.;  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, L. 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 :
Suppressing aeroelastic instability by means of broadband passive TET, part 1, theory
Publication date :
2007
Journal title :
AIAA Journal
ISSN :
0001-1452
eISSN :
1533-385X
Publisher :
American Institute of Aeronautics and Astronautics, Reston, United States - Virginia
Volume :
45
Pages :
693-711
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 August 2009

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