Non-linear vibration of planar case of three-blade bundle with dry friction contacts

dc.contributor.authorŠnábl, P.
dc.contributor.authorPešek, L.
dc.contributor.authorPůst, L.
dc.contributor.editorAdámek, Vítězslav
dc.contributor.editorJonášová, Alena
dc.contributor.editorPlánička, Stanislav
dc.contributor.editorZajíček, Martin
dc.date.accessioned2019-01-18T08:02:15Z
dc.date.available2019-01-18T08:02:15Z
dc.date.issued2018
dc.description.abstract-translatedUsing dry friction couplings (so called tie-bosses) between the blades in turbine rotors can be used to suppress dangerous resonant vibrations of turbine blades and it has been studied on our institute on various models. Experimental setup of three-blade bundle was built along with bladed wheel. The first set-up of the bundle was with blades turned 45 degrees to the disc plane. In that case the deformation of the blades causes turning of the ends of tie-bosses and edge contact together with multi-directional slip occurs. The experimental set-up was simplified herein so that the blades are parallel to the disc plane and in-line slip occurs. Although single electromagnet was used to excite the system, the first mode of vibration with no slip in tie-bosses just occurred. In case of bladed wheel, all blades have coupling through tie-bosses with neighbouring blades which stiffen them and raise their eigenfrequency. In our case, a mistuning by reducing mass of side blades caused similar behaviour. Steel to steel contact pair was used for the first tests.en
dc.description.sponsorshipThis work was supported by the research project of the Czech Science Foundation No. 16-04546S Aero-elastic couplings and dynamic behaviour of rotational periodic bodies´.en
dc.format2 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationComputational mechanics 2018: book of extended abstracts: 34th conference with international participation, p. 107-108.en
dc.identifier.isbn978-80-261-0819-1
dc.identifier.urihttp://hdl.handle.net/11025/30831
dc.language.isoenen
dc.publisherZápadočeská univerzita v Plznics
dc.relation.ispartofseriesComputational Mechanicsen
dc.rightsCopyright © 2018 University of West Bohemia, Plzeň, Czech Republicen
dc.rights.accessopenAccessen
dc.subjectsuchá frikcecs
dc.subjectlopatky turbínycs
dc.subjectnelineární vibracecs
dc.subjectnumerická simulacecs
dc.subject.translateddry frictionen
dc.subject.translatedturbine bladesen
dc.subject.translatednon-linear vibrationen
dc.subject.translatednumerical simulationen
dc.titleNon-linear vibration of planar case of three-blade bundle with dry friction contactsen
dc.typekonferenční příspěvekcs
dc.typeconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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