About: NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The steady-state response of a two-crack rotor system is investigated by computational simulations in the paper. The rotor system supported by radial active magnetic bearings is excited by centrifugal forces of discs unbalances. A flexibility matrix of Bernoulli beam element takes into account coupling phenomena between directions of vibration. The phenomenon occurs in cracked rotors. The couplings express relations between vibration in different directions, i.e. bending-torsion, bending-longitudinal, and torsion-longitudinal. The flexibility matrix elements of the cracked rotor are derived using the concepts of fracture mechanics for transverse surface crack. Partial opening/closing of cracks implemented in motion equations is determined by sign of stress intensity factor for mode I. The factor is computed for the crack edge. The motion equations are nonlinear because the system response depends on breathing of cracks and nonlinear force coupling is introduced by radial active magnetic bearings. Parametric studies of the system response were carried out in order to examine influence of various angles between two cracks. Several recommendations for detection of cracks and monitoring of the cracked rotor are suggested. The steady-state response of a two-crack rotor system is investigated by computational simulations in the paper. The rotor system supported by radial active magnetic bearings is excited by centrifugal forces of discs unbalances. A flexibility matrix of Bernoulli beam element takes into account coupling phenomena between directions of vibration. The phenomenon occurs in cracked rotors. The couplings express relations between vibration in different directions, i.e. bending-torsion, bending-longitudinal, and torsion-longitudinal. The flexibility matrix elements of the cracked rotor are derived using the concepts of fracture mechanics for transverse surface crack. Partial opening/closing of cracks implemented in motion equations is determined by sign of stress intensity factor for mode I. The factor is computed for the crack edge. The motion equations are nonlinear because the system response depends on breathing of cracks and nonlinear force coupling is introduced by radial active magnetic bearings. Parametric studies of the system response were carried out in order to examine influence of various angles between two cracks. Several recommendations for detection of cracks and monitoring of the cracked rotor are suggested. (en)
Title	NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS (en)
skos:prefLabel	NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS (en)
skos:notation	RIV/61989100:27230/12:86081413!RIV13-MSM-27230___
http://linked.open...avai/predkladatel	Fakulta strojní
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0070), Z(MSM6198910027)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	František, Ondřej
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Fakulta strojní
http://linked.open...dnocenehoVysledku	155070
http://linked.open...ai/riv/idVysledku	RIV/61989100:27230/12:86081413
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	radial active magnetic bearing; two-crack; Rotor (en)
http://linked.open.../riv/klicoveSlovo	Rotor radial active magnetic bearing two-crack
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[7502BC17D56D]
http://linked.open...i/riv/nazevZdroje	Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava. Řada strojní
http://linked.open...in/vavai/riv/obor	JR
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	IT4Innovations Centre of Excellence
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	LVII
http://linked.open...iv/tvurceVysledku	Ferfecki, Petr František, Ondřej RAO, Pankaj SHAH, Hardik
http://linked.open...n/vavai/riv/zamer	Výpočetně náročné počítačové simulace a optimalizace
issn	1210-0471
number of pages	10 (xsd:int)
http://localhost/t...ganizacniJednotka	27230
is http://linked.open...avai/riv/vysledek of	NUMERICAL SIMULATIONS OF STEADY-STATE OF TWO-CRACK ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS

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