Stability and bifurcation analysis of periodically excited rotors supported by hydrodynamic bearings of non-circular cross section

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F02%3A00006625" target="_blank" >RIV/61989100:27230/02:00006625 - 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

Stability and bifurcation analysis of periodically excited rotors supported by hydrodynamic bearings of non-circular cross section

Popis výsledku v původním jazyce

Properties of hydrodynamical bearings depend on the shape of their cross section. A correctly designed form of the bearing gap increases the stability limit and enables the rotor systems to operate at higher speed. Fluid film bearings are usually accommodated in the model systems by means of nonlinear force couplings. Determination of the components of the bearing forces arrives at solving a Reynolds' equation that describes the pressure distribution in the oil layer. In short bearings the solution canbe expressed in a closed form. For the case of long non-circular bearings a new numerical approach has been developed. As the pressure function is 2p periodic, it is approximated by a finite number of terms of a Fourier series. The Fourier coefficients are calculated by means of a trigonometric collocation method which requires to solve a set of linear algebraic equations. To avoid singularity of the coefficient matrix calculation of the Fourier coefficients is carried out by application

Název v anglickém jazyce

Stability and bifurcation analysis of periodically excited rotors supported by hydrodynamic bearings of non-circular cross section

Popis výsledku anglicky

Properties of hydrodynamical bearings depend on the shape of their cross section. A correctly designed form of the bearing gap increases the stability limit and enables the rotor systems to operate at higher speed. Fluid film bearings are usually accommodated in the model systems by means of nonlinear force couplings. Determination of the components of the bearing forces arrives at solving a Reynolds' equation that describes the pressure distribution in the oil layer. In short bearings the solution canbe expressed in a closed form. For the case of long non-circular bearings a new numerical approach has been developed. As the pressure function is 2p periodic, it is approximated by a finite number of terms of a Fourier series. The Fourier coefficients are calculated by means of a trigonometric collocation method which requires to solve a set of linear algebraic equations. To avoid singularity of the coefficient matrix calculation of the Fourier coefficients is carried out by application

Druh

D - Stať ve sborníku

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F02%2F0011" target="_blank" >GA101/02/0011: Nový přístup k analýze dynamických vlastností nelineárních vazebných elementů používaných v dynamice rotorových soustav</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the IFToMM Sixth International Conference on Rotor Dynamics

ISBN

0-7334-1961-5

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

952-959

Název nakladatele

UNSW

Místo vydání

Sydney

Místo konání akce

Sydney

Datum konání akce

30. 10. 2002

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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