EVALUATION OF THE COMPUTATIONAL SIMULATIONS OF NONLINEAR VIBRATION OF ROTORS SUPPORTED BY HYDRODYNAMIC BEARINGS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F10%3A86076225" target="_blank" >RIV/61989100:27230/10:86076225 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27690/10:86076225

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

EVALUATION OF THE COMPUTATIONAL SIMULATIONS OF NONLINEAR VIBRATION OF ROTORS SUPPORTED BY HYDRODYNAMIC BEARINGS

Popis výsledku v původním jazyce

The article deals with the influence of hydrodynamic bearings on the response of rotor systems excited by their imbalance. In the developed computational model the bearings are considered as cylindrical, short and cavitated (pí-film). The hydraulic forces are determined by integration of the pressure distribution in the oil film which is described by the Reynolds equation. To evaluate character of the rotor vibration forms of orbits, phase trajectories, steady-state time series of kinematic parameters of the centres of the bearings and the discs and their frequency spectra, Poincaré maps and bifurcation diagrams are used. The results of the carried out computational simulations show that due to nonlinear stiffness and damping parameters of the hydrodynamic bearings the imbalance force can excite not only periodic but also quasi-periodic or even chaotic oscillations and that their character and stability depends on the speed of the rotor rotation.

Název v anglickém jazyce

EVALUATION OF THE COMPUTATIONAL SIMULATIONS OF NONLINEAR VIBRATION OF ROTORS SUPPORTED BY HYDRODYNAMIC BEARINGS

Popis výsledku anglicky

The article deals with the influence of hydrodynamic bearings on the response of rotor systems excited by their imbalance. In the developed computational model the bearings are considered as cylindrical, short and cavitated (pí-film). The hydraulic forces are determined by integration of the pressure distribution in the oil film which is described by the Reynolds equation. To evaluate character of the rotor vibration forms of orbits, phase trajectories, steady-state time series of kinematic parameters of the centres of the bearings and the discs and their frequency spectra, Poincaré maps and bifurcation diagrams are used. The results of the carried out computational simulations show that due to nonlinear stiffness and damping parameters of the hydrodynamic bearings the imbalance force can excite not only periodic but also quasi-periodic or even chaotic oscillations and that their character and stability depends on the speed of the rotor rotation.

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

<a href="/cs/project/GAP101%2F10%2F0209" target="_blank" >GAP101/10/0209: Výzkum a modelování vlivu řízení meze tečení magnetoreologické kapaliny v tenkém mazacím filmu na kmitání rotorů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Transactions of the VŠB - Technical University of Ostrava, Mechanical Series

ISSN

1210-0471

e-ISSN

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Svazek periodika

LVI

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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