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

Result code in 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>

Alternative codes found

RIV/61989100:27740/22:10251658

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

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

Continuities

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

Publication year

2022

Confidentiality

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

Article name in the collection

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

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Number of pages

4

Pages from-to

409-412

Publisher name

Institute of Theoretical and Applied Mechanics - Czech Academy of Sciences

Place of publication

Praha

Event location

Milovy

Event date

May 9, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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