ANALYSIS OF VIBRATION OF ROTORS WITH A THICK RIGID DISC ON THE OVERHANGING END SUPPORTED BY HYDRODYNAMIC BEARINGS AND LOADED BY UNCERTAIN UNBALANCE EFFECTS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F22%3A10251658" target="_blank" >RIV/61989100:27230/22:10251658 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/22:10251658

Výsledek na webu

<a href="https://www.engmech.cz/improc/2022/409.pdf" target="_blank" >https://www.engmech.cz/improc/2022/409.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21495/51-2-409" target="_blank" >10.21495/51-2-409</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ANALYSIS OF VIBRATION OF ROTORS WITH A THICK RIGID DISC ON THE OVERHANGING END SUPPORTED BY HYDRODYNAMIC BEARINGS AND LOADED BY UNCERTAIN UNBALANCE EFFECTS

Popis výsledku v původním jazyce

Rotors of some rotating machines consist of a shaft and a rigid disc attached to its overhanging end. Because of manufacturing and assembling inaccuracies, the disc is unbalanced. In general case, the disc principal axis of inertia deviates from the shaft axis (both axes are skew lines) and the disc center of gravity is not situated on the shaft center line. Then the disc inertia effects are the source inducing the rotor lateral vibration. As magnitude of parameters specifying the disc unbalance is uncertain, application of an adequate method is required to perform the analysis. In addition, if the rotor is supported by hydrodynamic bearings, their nonlinear properties lead to rising complexity of the system vibration and to reducing its predictability. In the presented paper, the motion equation of a rigid disc has been derived. The shaft was represented by a beam body that was discretized into finite elements. The stiffness and damping parameters of the hydrodynamic bearings were linearized in vicinity of the rotor equilibrium position. Then vibration of the rotor is governed by a set of linearized motion equations. The fuzzy numbers were applied to consider uncertainty of the disc unbalance parameters. The presented procedure provides the approach to computational analysis of rotating machines with the rotor having a disc attached to its overhanging end and the geometrical, mechanical, or technological parameters of which have uncertain values.

Název v anglickém jazyce

ANALYSIS OF VIBRATION OF ROTORS WITH A THICK RIGID DISC ON THE OVERHANGING END SUPPORTED BY HYDRODYNAMIC BEARINGS AND LOADED BY UNCERTAIN UNBALANCE EFFECTS

Popis výsledku anglicky

Rotors of some rotating machines consist of a shaft and a rigid disc attached to its overhanging end. Because of manufacturing and assembling inaccuracies, the disc is unbalanced. In general case, the disc principal axis of inertia deviates from the shaft axis (both axes are skew lines) and the disc center of gravity is not situated on the shaft center line. Then the disc inertia effects are the source inducing the rotor lateral vibration. As magnitude of parameters specifying the disc unbalance is uncertain, application of an adequate method is required to perform the analysis. In addition, if the rotor is supported by hydrodynamic bearings, their nonlinear properties lead to rising complexity of the system vibration and to reducing its predictability. In the presented paper, the motion equation of a rigid disc has been derived. The shaft was represented by a beam body that was discretized into finite elements. The stiffness and damping parameters of the hydrodynamic bearings were linearized in vicinity of the rotor equilibrium position. Then vibration of the rotor is governed by a set of linearized motion equations. The fuzzy numbers were applied to consider uncertainty of the disc unbalance parameters. The presented procedure provides the approach to computational analysis of rotating machines with the rotor having a disc attached to its overhanging end and the geometrical, mechanical, or technological parameters of which have uncertain values.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/LQ1602" target="_blank" >LQ1602: IT4Innovations excellence in science</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Engineering Mechanics 2022 : 27/28th international conference : May 9-12, 2022, Milovy, Czech Republic : book of full texts

ISBN

978-80-86246-48-2

ISSN

1805-8248

e-ISSN

—

Počet stran výsledku

4

Strana od-do

409-412

Název nakladatele

Institute of Theoretical and Applied Mechanics - Czech Academy of Sciences

Místo vydání

Praha

Místo konání akce

Milovy

Datum konání akce

9. 5. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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