Triggering mechanisms of limit cycle oscillations in a two degree-of-freedom wing flutter model

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

dc.contributor.author	Lee, YS	en
dc.contributor.author	Bergman, LA	en
dc.contributor.author	McFarland, DM	en
dc.contributor.author	Vakakis, AF	en
dc.contributor.author	Kerschen, G	en
dc.date.accessioned	2014-03-01T02:50:13Z
dc.date.available	2014-03-01T02:50:13Z
dc.date.issued	2005	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34966
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33144470720&partnerID=40&md5=963d615ae687c389d0767d328064f6f9	en
dc.subject.other	Limit cycle oscillations (LCO)	en
dc.subject.other	Permanent resonance capture (PRC)	en
dc.subject.other	Transient resonance capture (TRC)	en
dc.subject.other	Wing flutter models	en
dc.subject.other	Aerodynamics	en
dc.subject.other	Degrees of freedom (mechanics)	en
dc.subject.other	Mathematical models	en
dc.subject.other	Resonance	en
dc.subject.other	Stiffness	en
dc.subject.other	Wavelet transforms	en
dc.subject.other	Oscillations	en
dc.title	Triggering mechanisms of limit cycle oscillations in a two degree-of-freedom wing flutter model	en
heal.type	conferenceItem	en
heal.publicationDate	2005	en
heal.abstract	We show numerically that the triggering mechanisms of limit cycle oscillations (LCOs) due to aeroelastic instability are composed of a series of resonance captures. We consider a two degree-of-freedom (DOF) wing model with cubic nonlinear stiffnesses in the support, assuming quasi-steady aerodynamics and subsonic flow around the wing. Then, we establish the slow flow dynamics model, using the complexification / averaging technique and considering three frequency components; i.e., the two linear natural frequencies corresponding to heave and pitch and the superharmonic component which appears as three times the pitch frequency. It turns out that the LCO triggering mechanisms consist of mainly three stages: (i) transient resonance capture (TRC); (ii) escape; and (iii) permanent resonance capture (PRC). We examine the characteristics of each stage by way of time response, wavelet transform, phase plane, and instantaneous energy. Copyright © 2005 by ASME.	en
heal.journalName	Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - DETC2005	en
dc.identifier.volume	1 C	en
dc.identifier.spage	1863	en
dc.identifier.epage	1872	en