Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/347406
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampMendes, Ricardo Ugliara-
dc.contributor.authorunicampDedini, Katia Lucchesi Cavalca-
dc.typeArtigopt_BR
dc.titleOn the instability threshold of journal bearing supported rotorspt_BR
dc.contributor.authorMendes, Ricardo Ugliara-
dc.contributor.authorCavalca, Katia Lucchesi-
dc.subjectRotorespt_BR
dc.subject.otherlanguageRotorspt_BR
dc.description.abstractJournal bearing supported rotors present two kinds of self-excited vibrations: oil-whirl and oil-whip. The first one is commonly masked by the rotor unbalance, hence being rarely associated with instability problems. Oil-whip is a severe vibration which occurs when the oil-whirl frequency coincides with the first flexural natural frequency of the shaft. In many cases, oil-whip is the only fluid-induced instability considered during the design stage; however, experimental evidences have shown that the instability threshold may occur much sooner, demanding a better comprehension of the instability mechanism. In this context, numerical simulations were made in order to improve the identification of the instability threshold for two test rig configurations: one on which the instability occurs on the oil-whip frequency, and another which became unstable before this threshold. Therefore, the main contribution of this paper is to present an investigation of two different thresholds of fluid-induced instabilities and their detectability on design stage simulations based on rotordynamic analysis using linear speed dependent coefficients for the bearingspt_BR
dc.relation.ispartofInternational journal of rotating machinerypt_BR
dc.publisher.cityLondonpt_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherHindawipt_BR
dc.date.issued2014-
dc.date.monthofcirculationFeb.pt_BR
dc.language.isoengpt_BR
dc.description.volume2014pt_BR
dc.rightsAbertopt_BR
dc.sourceSCOPUSpt_BR
dc.identifier.issn1023-621Xpt_BR
dc.identifier.eissn1542-3034pt_BR
dc.identifier.doi10.1155/2014/351261pt_BR
dc.identifier.urlhttps://www.hindawi.com/journals/ijrm/2014/351261/pt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsordocumentnumber131658/2010-7pt_BR
dc.description.sponsordocumentnumberPROBRAL 341/10pt_BR
dc.description.sponsordocumentnumber2007/54647-4pt_BR
dc.date.available2020-08-14T14:09:08Z-
dc.date.accessioned2020-08-14T14:09:08Z-
dc.description.provenanceSubmitted by Susilene Barbosa da Silva (susilene@unicamp.br) on 2020-08-14T14:09:08Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-07T20:39:30Z : No. of bitstreams: 1 2-s2.0-84894821865.pdf: 5913562 bytes, checksum: 0eed29e7d7e496a4979bcd38e9e5a819 (MD5) Bitstreams deleted on 2021-01-08T14:10:09Z: 2-s2.0-84894821865.pdf,. Added 1 bitstream(s) on 2021-01-08T14:13:12Z : No. of bitstreams: 1 2-s2.0-84894821865.pdf: 5913562 bytes, checksum: 0eed29e7d7e496a4979bcd38e9e5a819 (MD5) Bitstreams deleted on 2021-01-13T13:27:07Z: 2-s2.0-84894821865.pdf,. Added 1 bitstream(s) on 2021-01-13T13:28:58Z : No. of bitstreams: 1 2-s2.0-84894821865.pdf: 5913562 bytes, checksum: 0eed29e7d7e496a4979bcd38e9e5a819 (MD5)en
dc.description.provenanceMade available in DSpace on 2020-08-14T14:09:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2014en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/347406-
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.departmentDepartamento de Projeto Mecânicopt_BR
dc.contributor.unidadeFaculdade de Engenharia Mecânicapt_BR
dc.contributor.unidadeFaculdade de Engenharia Mecânicapt_BR
dc.subject.keywordInstabilitypt_BR
dc.identifier.source2-s2.0-84894821865pt_BR
dc.creator.orcidSem informaçãopt_BR
dc.creator.orcid0000-0002-7242-8909pt_BR
dc.type.formArtigo de pesquisapt_BR
dc.identifier.articleid351261pt_BR
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