A computational investigation of vibration attenuation of a rigid rotor turning at a variable speed by means of short magnetorheological dampers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F09%3A00341505" target="_blank" >RIV/61388998:_____/09:00341505 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A computational investigation of vibration attenuation of a rigid rotor turning at a variable speed by means of short magnetorheological dampers

Popis výsledku v původním jazyce

Imbalance of the rotors induces their lateral vibration and forces that are transmitted via the bearings into the foundations. These phenomena are significant if the rotor passes over the critical speeds. The vibration can be reduced if the rotor supports are equipped with damping elements. To achieve their optimum performance the damping effect must be controllable. This is enabled by application of semiactive magnetorheological squeeze film dampers. Derivation of the equations of motion starts from the first and second impulse theorems. The pressure distribution in the thin lubricating film is described by a Reynolds' equation modified for the case of Bingham liquid. The hydraulic force acting on the rotor journal is then obtained by integration of the pressure distribution around the circumference and along the length of the damper. Applicability of the developed procedures was tested by means of computer simulations.

Název v anglickém jazyce

A computational investigation of vibration attenuation of a rigid rotor turning at a variable speed by means of short magnetorheological dampers

Popis výsledku anglicky

Imbalance of the rotors induces their lateral vibration and forces that are transmitted via the bearings into the foundations. These phenomena are significant if the rotor passes over the critical speeds. The vibration can be reduced if the rotor supports are equipped with damping elements. To achieve their optimum performance the damping effect must be controllable. This is enabled by application of semiactive magnetorheological squeeze film dampers. Derivation of the equations of motion starts from the first and second impulse theorems. The pressure distribution in the thin lubricating film is described by a Reynolds' equation modified for the case of Bingham liquid. The hydraulic force acting on the rotor journal is then obtained by integration of the pressure distribution around the circumference and along the length of the damper. Applicability of the developed procedures was tested by means of computer simulations.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Applied and Computational Mechanics

ISSN

1802-680X

e-ISSN

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Svazek periodika

3

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

12

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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