Reference : Flutter and limit cycle oscillation suppression using linear and nonlinear tuned vibr...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
http://hdl.handle.net/2268/207849
Flutter and limit cycle oscillation suppression using linear and nonlinear tuned vibration absorbers
English
Verstraelen, Edouard mailto [Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Kerschen, Gaëtan mailto [Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Dimitriadis, Grigorios mailto [Université de Liège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale >]
Feb-2017
Proceedings of the SEM IMAC XXXV
No
No
International
Conférence IMAC XXXV
30/1/2017 - 2/2/2017
Society for Experimental Mechanics (SEM)
Garden Grove
USA
[en] Aeroelasticity ; Limit Cycle Oscillation ; Bifurcation ; Piezoelectric ; Nonlinear Tuned Vibration Absorber
[en] Aircraft are more than ever pushed to their limits for performance reasons. Consequently, they become increasingly nonlinear and they are more prone to undergo aeroelastic limit cycle oscillations. Structural nonlinearities affect aircraft such as the F-16, which can undergo store-induced limit cycle oscillations (LCOs). Furthermore, transonic buzz can lead to LCOs because of moving shock waves in transonic flight conditions on many aircraft.
This study presents a numerical investigation of passive LCO suppression on a typical aeroelastic system with pitch and plunge degrees of freedom and a hardening stiffness nonlinearity. The absorber used is made of a piezoelectric patch glued to the plunge springs and connected to a resistor and an inductance forming a RLC circuit. A mechanical tuned mass damper absorber of similar configuration is also considered. The piezoelectric absorber features significant advantages in terms of size, weight and tuning convenience.
The results show that both types of absorber increase the linear flutter speed of the system in a similar fashion but, when optimal, they lead to a sub-critical bifurcation while a super-critical bifurcation was observed without absorber. Finally, it is shown that the addition of a properly tuned nonlinear spring (mechanical absorber) or capacitor (piezo- electric absorber) can restore the super-criticality of the bifurcation. The tuning of the nonlinearity is carried out using numerical continuation.
UE - Union Européenne
The nonlinear tuned vibration absorber (NoVib 307265)
Researchers ; Professionals
http://hdl.handle.net/2268/207849
10.1007/978-3-319-54735-0_32
FP7 ; 307265 - NOVIB - The Nonlinear Tuned Vibration Absorber

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
301_ver.pdfAuthor preprint1.98 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.