About: Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades

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About: Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The development of steam turbine's blades is closely related to the computer modelling of their vibrations. In this work, a numeric method that (i) implements the calculation of nonlinear vibrations (ii) makes use of the cyclic symmetry of the bladed disk and (iii) models structural contact elements between blades is presented. The cyclic symmetry properties of the bladed disk are used for the calculations of its natural frequencies and mode shapes, then, these are employed in the analysis of its nonlinear vibrations. The contact elements reinforce the bladed disk and act as friction dampers in case of its exceeding excitation. Contact areas between blades are modeled via coupling elements implementing dry Coulomb friction. The method is demonstrated on the particular case of the bladed disk equipped with the LSB48 blades and excited by travelling-wave of two nodal diameters. Finally, the accuracy of the mathematical model and the concept of a contact stiffness are discussed. The development of steam turbine's blades is closely related to the computer modelling of their vibrations. In this work, a numeric method that (i) implements the calculation of nonlinear vibrations (ii) makes use of the cyclic symmetry of the bladed disk and (iii) models structural contact elements between blades is presented. The cyclic symmetry properties of the bladed disk are used for the calculations of its natural frequencies and mode shapes, then, these are employed in the analysis of its nonlinear vibrations. The contact elements reinforce the bladed disk and act as friction dampers in case of its exceeding excitation. Contact areas between blades are modeled via coupling elements implementing dry Coulomb friction. The method is demonstrated on the particular case of the bladed disk equipped with the LSB48 blades and excited by travelling-wave of two nodal diameters. Finally, the accuracy of the mathematical model and the concept of a contact stiffness are discussed. (en)
Title	Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades (en)
skos:prefLabel	Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades (en)
skos:notation	RIV/49777513:23640/14:43923936!RIV15-MSM-23640___
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Voldřich, Josef Lazar, Jan
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Západočeská univerzita v Plzni / Nové technologie - výzkumné centrum
http://linked.open...dnocenehoVysledku	52259
http://linked.open...ai/riv/idVysledku	RIV/49777513:23640/14:43923936
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	LSB48 blade; contact stiffness; friction contact; nonlinear vibration; mode shape; natural frequency; cyclic symmetry; Bladed disk (en)
http://linked.open.../riv/klicoveSlovo	natural frequency nonlinear vibration contact stiffness mode shape cyclic symmetry friction contact LSB48 blade Bladed disk
http://linked.open...ontrolniKodProRIV	[875266114810]
http://linked.open...v/mistoKonaniAkce	Vysoké Tatry, Slovensko
http://linked.open...i/riv/mistoVydani	Amsterdam
http://linked.open...i/riv/nazevZdroje	Procedia Engineering
http://linked.open...in/vavai/riv/obor	JR
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Polach, Pavel Voldřich, Josef Lazar, Jan Míšek, Tomáš
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2014-11-25 (xsd:date)
issn	1877-7058
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.proeng.2014.12.122
http://purl.org/ne...btex#hasPublisher	Elsevier
http://localhost/t...ganizacniJednotka	23640

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