About: Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings

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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	Hydrodynamic bearings are frequently used due to their large carrying capacity and favourable damping characteristics. However for the operation at higher revolutions the fluid-induced instabilities known as oil whirl and oil whip can appear. The mathematical model of the rotor system is assembled under the assumption of rigid shaft, massless bearing shells and nonlinear bearing forces determined on the base of short cylindrical bearing theory from Reynolds equation. By proposed feedback controller the movable bearing shells are directly excited by kinematic excitation. On the base of simulations it was found out that the displacement amplitude of shaft with feedback control was always reduced in the whole revolution range and the limit of oil whirl was shifted to the higher revolutions in case of properly chosen control parameters. Hydrodynamic bearings are frequently used due to their large carrying capacity and favourable damping characteristics. However for the operation at higher revolutions the fluid-induced instabilities known as oil whirl and oil whip can appear. The mathematical model of the rotor system is assembled under the assumption of rigid shaft, massless bearing shells and nonlinear bearing forces determined on the base of short cylindrical bearing theory from Reynolds equation. By proposed feedback controller the movable bearing shells are directly excited by kinematic excitation. On the base of simulations it was found out that the displacement amplitude of shaft with feedback control was always reduced in the whole revolution range and the limit of oil whirl was shifted to the higher revolutions in case of properly chosen control parameters. (en)
Title	Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings (en)
skos:prefLabel	Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings (en)
skos:notation	RIV/61388998:_____/09:00335159!RIV10-AV0-61388998
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA101/07/1345), P(GP101/07/P368), Z(AV0Z20760514)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Ondrouch, Jan Ferfecki, Petr
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	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	330238
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/09:00335159
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	active control; rotor system; hydrodynamic bearing instability (en)
http://linked.open.../riv/klicoveSlovo	rotor system active control hydrodynamic bearing instability
http://linked.open...ontrolniKodProRIV	[D8E43762786E]
http://linked.open...v/mistoKonaniAkce	Zakopane
http://linked.open...i/riv/mistoVydani	Krakow
http://linked.open...i/riv/nazevZdroje	Active Noise and Vibration Control Methods
http://linked.open...in/vavai/riv/obor	JR
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Active control of journal bearings aimed at suppressing the rotor instability Numerical modelling of vibration during of undesirable operating conditions of a rotor systems supported by active magnetic bearings
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Ferfecki, Petr Ondrouch, Jan Poruba, Z.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2009-05-24 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Complex dynamical systems in thermodynamics, fluid and solid mechanics
number of pages	10 (xsd:int)
http://purl.org/ne...btex#hasPublisher	AGH University of Science and Technology
https://schema.org/isbn	83-89772-06-X
is http://linked.open...avai/riv/vysledek of	Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings

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