FLOW-INDUCED VIBRATION OF A LONG FLEXIBLE SHEET IN TANGENTIAL FLOW

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dc.contributor.authorŠidlof, Petr
dc.contributor.authorKolář, Jan
dc.contributor.authorPeukert, Pavel
dc.date.accessioned2019-10-07T07:18:28Z
dc.date.available2019-10-07T07:18:28Z
dc.date.issued2018
dc.description.abstractDuring certain stages of the offset printing process, the paper sheet is conveyed by the blower air. Vibration and acoustic measurements confirmed that under certain circumstances the sheet undergoes flow-induced vibration with significant amplitudes, generating a serious noise source at the same frequency. In order to understand the fluid-structure interaction between the flexible paper sheet and air exiting the nozzles, and to assess the conditions when unstable paper vibration with large amplitudes is possible, a simplified analytical model was developed. The paper sheet, modeled as a flexible 1D chain, is fully coupled to quasi-1D inviscid flow. Under the assumption of small deflections, the coupled equations can be analytically solved in frequency domain, yielding complex eigenfrequencies of the system. For a given flow velocity (corresponding to a specific air pressure setting), the real and imaginary part of the eigenfrequency determines whether the system is stable or unstable.cs
dc.format.extent6 strancs
dc.identifier.doi10.14311/TPFM.2018.034
dc.identifier.orcid0000-0002-4017-0819 Šidlof, Petr
dc.identifier.urihttps://dspace.tul.cz/handle/15240/153848
dc.identifier.urihttp://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2018/34-TPFM2018.pdf
dc.language.isocscs
dc.publisherACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS, DOLEJSKOVA 5, PRAGUE 8, 182 00, CZECH REPUBLIC
dc.relation.ispartofTOPICAL PROBLEMS OF FLUID MECHANICS 2018
dc.relation.ispartofseriesTopical Problems of Fluid Mechanics
dc.subjectoffset printing systemscs
dc.subjectfluttercs
dc.subjectfluid-structure interactioncs
dc.titleFLOW-INDUCED VIBRATION OF A LONG FLEXIBLE SHEET IN TANGENTIAL FLOWcs
dc.typeProceedings Paper
local.citation.epage256
local.citation.spage251
local.event.edate2018-02-23
local.event.locationPrague, CZECH REPUBLIC
local.event.sdate2018-02-21
local.event.titleConference on Topical Problems of Fluid Mechanics
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