Enhancing the robustness of aeroelastic instability suppression using multi-degree-of-freedom nonlinear energy sinks

Lee, YS; Vakakis, AF; Bergman, LA; McFarland, DM; Kerschen, G

dc.contributor.author	Lee, YS	en
dc.contributor.author	Vakakis, AF	en
dc.contributor.author	Bergman, LA	en
dc.contributor.author	McFarland, DM	en
dc.contributor.author	Kerschen, G	en
dc.date.accessioned	2014-03-01T01:28:16Z
dc.date.available	2014-03-01T01:28:16Z
dc.date.issued	2008	en
dc.identifier.issn	0001-1452	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18791
dc.subject.classification	Engineering, Aerospace	en
dc.subject.other	Aeroelastic instabilities	en
dc.subject.other	Aeroelastic modes	en
dc.subject.other	American Institute of Aeronautics and Astronautics (AIAA)	en
dc.subject.other	instability suppression	en
dc.subject.other	Limit cycle oscillations (LCOs)	en
dc.subject.other	limit points	en
dc.subject.other	Limit-cycle oscillation (LCO)	en
dc.subject.other	Mass effects	en
dc.subject.other	Multi degree of freedom (mdof)	en
dc.subject.other	Multi-modal	en
dc.subject.other	Nonlinear energy sink (NES)	en
dc.subject.other	Nonlinear modal interactions	en
dc.subject.other	Numerical bifurcation analysis	en
dc.subject.other	Parameter values	en
dc.subject.other	robustness enhancement	en
dc.subject.other	Single degree-of-freedom (SDOF)	en
dc.subject.other	Structural nonlinearities	en
dc.subject.other	Vibration energies	en
dc.subject.other	Aviation	en
dc.subject.other	Bifurcation (mathematics)	en
dc.subject.other	Energy storage	en
dc.subject.other	Energy transfer	en
dc.subject.other	Fighter aircraft	en
dc.subject.other	Hopf bifurcation	en
dc.subject.other	Oscillators (electronic)	en
dc.subject.other	Polarization	en
dc.subject.other	Ultrasonic devices	en
dc.subject.other	Light weight structures	en
dc.title	Enhancing the robustness of aeroelastic instability suppression using multi-degree-of-freedom nonlinear energy sinks	en
heal.type	journalArticle	en
heal.identifier.primary	10.2514/1.30302	en
heal.identifier.secondary	http://dx.doi.org/10.2514/1.30302	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	In this last of a three paper sequence, we use simultaneous multimodal broadband targeted energy transfers to multi-degree-of-freedom nonlinear energy sinks to improve the robustness of aeroelastic instability suppression of a rigid wing with structural nonlinearities. A numerical bifurcation analysis of limit cycle oscillations of the wing with the multi-degree-of-freedom nonlinear energy sinks attached shows that controlling the lower parameter value for limit point cycle bifurcation to occur above Hopf bifurcation is crucial to enhancing the robustness of limit cycle oscillation suppression. We demonstrate that multi-degree-of-freedom nonlinear energy sinks can greatly enhance the robustness of limit cycle oscillation suppression, compared with single-degree-of-freedom nonlinear energy sinks (which were studied in our previous papers), with a much smaller total mass. We also investigate the nonlinear modal interactions that occur between the aeroelastic modes and the multi-degree-of-freedom nonlinear energy sinks, in an effort to gain a physical understanding of the mechanisms governing instability suppression. We demonstrate that a properly designed multi-degree-of-freedom nonlinear energy sink provides robustness of aeroelastic instability suppression by efficiently, passively, and rapidly transferring a significant portion of unwanted vibration energy to the furthest mass of the nonlinear energy sink. Consideration of other types of multi-degree-of-freedom nonlinear energy sinks suggests that the robustness enhancement is achieved by the concentrated mass effect of the attached nonlinear energy sinks. Copyright © 2008 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.	en
heal.publisher	AMER INST AERONAUT ASTRONAUT	en
heal.journalName	AIAA Journal	en
dc.identifier.doi	10.2514/1.30302	en
dc.identifier.isi	ISI:000256900500009	en
dc.identifier.volume	46	en
dc.identifier.issue	6	en
dc.identifier.spage	1371	en
dc.identifier.epage	1394	en