Article (Scientific journals)
Suppressing aeroelastic instability by means of broadband targeted energy transfers, part 2: Experiments
Lee, Y. S.; Kerschen, Gaëtan; McFarland, D. M. et al.
2007In AIAA Journal, 45 (10), p. 2391-2400
Peer Reviewed verified by ORBi
 

Files


Full Text
38_aiaa.pdf
Author postprint (9.21 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Suppressing Aeroelastic Instability; Targeted Energy Transfers; Aeroelastic Instability; nonlinear energy sink; rigid airfoil; limit cycle oscillation
Abstract :
[en] This paper presents experimental results corroborating the analysis developed in the companion paper, Part I (Lee, Y., Vakakis, A., Bergman, L., McFarland, M., and Kerschen G., "Suppression Aeroelastic Instability Using Broadband Passive Targeted Energy Transfers, Part 1: Theory," AIAA Journal, Vol. 45, No. 3, 2007, pp. 693-711), and demonstrates that a nonlinear energy sink can improve the stability of an aeroelastic system. The nonlinear energy sink was, in this case, attached to the heave (plunge) degree of freedom of a rigid airfoil which was supported in a low-speed wind tunnel by nonlinear springs separately adjustable in heave and pitch. This airfoil was found to exhibit a at flow speeds above the critical ('flutter") speed of 9.5 m/s, easily triggered by an initial heave displacement. After attachment of a single degree of freedom, essentially nonlinear energy sink to the wing, the combined system exhibited improved dynamic response as measured by the reduction or elimination of limit cycle oscillation at flow speeds significantly greater than the wing's critical speed. The design, application, and performance of the nonlinear energy sink are described herein, and the results obtained are compared to analytical predictions. The physics of the interaction of the sink with the wing is examined in detail.
Disciplines :
Mechanical engineering
Electrical & electronics engineering
Author, co-author :
Lee, Y. S.;  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
McFarland, D. M.;  University of Illinois at Urbana-Champaign > Department of Aerospace Engineering
Hill, W. J.;  Texas A&M University > College Station
Nichkawde, C.;  Texas A&M University > College Station
Strganac, T. W.;  Texas A&M University, > College Station
Bergman, L. A.;  University of Illinois at Urbana-Champaign > Department of Aerospace Engineering
Vakakis, Alexander F.;  National Technical University of Athens > Department of Mechanical and Industrial Engineering
Language :
English
Title :
Suppressing aeroelastic instability by means of broadband targeted energy transfers, part 2: Experiments
Publication date :
October 2007
Journal title :
AIAA Journal
ISSN :
0001-1452
eISSN :
1533-385X
Publisher :
Amer Inst Aeronaut Astronaut, Reston, United States - Virginia
Volume :
45
Issue :
10
Pages :
2391-2400
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 August 2009

Statistics


Number of views
111 (5 by ULiège)
Number of downloads
2 (2 by ULiège)

Scopus citations®
 
144
Scopus citations®
without self-citations
119
OpenCitations
 
117

Bibliography


Similar publications



Contact ORBi