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dc.contributor.authorPresas Batlló, Alexandre
dc.contributor.authorValentín Ruiz, David
dc.contributor.authorValero Ferrando, Ma. del Carmen
dc.contributor.authorEgusquiza Montagut, Mònica
dc.contributor.authorEgusquiza Estévez, Eduard
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica
dc.date.accessioned2020-01-28T12:31:08Z
dc.date.available2020-01-28T12:31:08Z
dc.date.issued2019-09-14
dc.identifier.citationPresas, A. [et al.]. Experimental measurements of the natural frequencies and mode shapes of rotating disk-blades-disk assemblies from the stationary frame. "Applied sciences", 14 Setembre 2019, vol. 9, núm. 8, p. 3864:1-3864:22.
dc.identifier.issn2076-3417
dc.identifier.urihttp://hdl.handle.net/2117/175907
dc.description.abstractDetermining the natural frequencies and mode shapes of rotating turbomachinery components from both rotating and stationary reference frames is of paramount importance to avoid resonance problems that could affect the normal operation of the machine, or even cause critical damages in these components. Due to their similarity to real engineering cases, this topic has been experimentally analyzed in the past for disk-shaft assemblies and rotor disk-blades assemblies (bladed-disk or blisk). The same topic is less analyzed for disk-blades-disk assemblies, although such configurations are widely used in centrifugal closed impellers of compressors, hydraulic pumps, pump-turbines, and runners of high head Francis turbines. In this paper, experimental measurements, varying the rotating speed of a disk-blade-disk assembly and exciting the first natural frequencies of the rotating frame, have been performed. The rotating structure is excited and measured by means of PZT patches from the rotating frame and with a Laser Doppler Vibrometer (LDV). In order to interpret the experimental results obtained from the stationary frame, a method to decompose the diametrical mode shapes of the structure in simple diametrical components (which define the diametrical mode shapes of a simple disk) has been proposed. It is concluded that the resonant frequencies detected with a stationary sensor correspond to the ones predicted with the decomposition method. Finally, a means to obtain equivalent results with numerical simulation methods is shown.
dc.language.isoeng
dc.publisherMultidisciplinary Digital Publishing Institute
dc.rightsAttribution-BY 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshCentrifugal pumps
dc.subject.otherNatural frequencies
dc.subject.otherMode-shapes
dc.subject.otherModal analysis
dc.subject.otherCentrifugal pumps
dc.subject.otherPump-turbine
dc.subject.otherClosed impellers
dc.titleExperimental measurements of the natural frequencies and mode shapes of rotating disk-blades-disk assemblies from the stationary frame
dc.typeArticle
dc.subject.lemacBombes centrífugues
dc.contributor.groupUniversitat Politècnica de Catalunya. FLUIDS - Enginyeria de Fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica
dc.identifier.doi10.3390/app9183864
dc.relation.publisherversionhttps://www.mdpi.com/2076-3417/9/18/3864
dc.rights.accessOpen Access
local.identifier.drac25854700
dc.description.versionPostprint (published version)
local.citation.authorPresas, A.; Valentin, D.; Valero, M.; Egusquiza, M.; Egusquiza, E.
local.citation.publicationNameApplied sciences
local.citation.volume9
local.citation.number8
local.citation.startingPage3864:1
local.citation.endingPage3864:22


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