Influence of friction and asymmetric freeplay on the limit cycle oscillation in aeroelastic system: An extended Henon's technique to temporal integration

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dc.contributor.authorWayhs-Lopes, Larissa Drews [UNESP]
dc.contributor.authorDowell, Earl H.
dc.contributor.authorBueno, Douglas D. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionDuke Univ
dc.date.accessioned2020-12-10T20:02:47Z
dc.date.available2020-12-10T20:02:47Z
dc.date.issued2020-07-01
dc.description.abstractNonlinear effects such as friction and freeplay on the control surfaces can affect aeroelastic dynamics during flight. In particular, these nonlinearities can induce limit cycle oscillations (LCO), changing the system stability, and because of this it is essential to employ computational methods to predict this type of motion during the aircraft development cycle. In this context, the present article presents a matrix notation for describing the Henon's method used to reduce errors when considering piecewise linear nonlinearities in the numerical integration process. In addition, a new coordinate system is used to write the aeroelastic system of equations. The proposal defines a displacement vector with generalized and physical variables to simplify the computational implementation of the Henon's technique. Additionally, the article discusses the influence of asymmetric freeplay and friction on the LCO of an airfoil with control surface. The results show that the extended Henon's technique provides more accurate LCO predictions, that friction can change the frequency and amplitude of these motions, and the asymmetry of freeplay is important to determine the LCO behavior. (C) 2020 Elsevier Ltd. All rights reserved.en
dc.description.affiliationSao Paulo State Univ, Dept Mech Engn, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationDuke Univ, Durham, NC USA
dc.description.affiliationSao Paulo State Univ, Dept Math, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Dept Mech Engn, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Dept Math, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 18/23348-6
dc.description.sponsorshipIdFAPESP: 17/08008-1
dc.description.sponsorshipIdFAPESP: 18/25194-6
dc.format.extent18
dc.identifierhttp://dx.doi.org/10.1016/j.jfluidstructs.2020.103054
dc.identifier.citationJournal Of Fluids And Structures. London: Academic Press Ltd- Elsevier Science Ltd, v. 96, 18 p., 2020.
dc.identifier.doi10.1016/j.jfluidstructs.2020.103054
dc.identifier.issn0889-9746
dc.identifier.urihttp://hdl.handle.net/11449/196991
dc.identifier.wosWOS:000541140700013
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal Of Fluids And Structures
dc.sourceWeb of Science
dc.subjectAsymmetric freeplay
dc.subjectFriction force
dc.subjectLimit cycle oscillation
dc.subjectExtended Henon's technique
dc.subjectModified generalized coordinate system
dc.titleInfluence of friction and asymmetric freeplay on the limit cycle oscillation in aeroelastic system: An extended Henon's technique to temporal integrationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0002-1783-0524[3]

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