Investigation of lateral vibration of rotors supported by long fluid film bearings of non-circular cross section induced by kinematic excitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F02%3A00006623" target="_blank" >RIV/61989100:27230/02:00006623 - 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

Investigation of lateral vibration of rotors supported by long fluid film bearings of non-circular cross section induced by kinematic excitation

Popis výsledku v původním jazyce

One possibility how to decrease lateral vibration of rotors that is induced by their foundation movement is to couple the shaft with the stationary part through fluid film bearings. In computational models they are usually incorporated by means of nonlinear force couplings. To determine radial and tangential components of the hydraulical force a pressure function that describes the oil pressure distribution in the bearing gap must be known. This requires to solve a Reynolds' equation. If the bearings are long and of non-circular cross section, a numerical approach must be used. For this purpose a trigonometric collocation method has been proposed. Calculatuion of the Fourier coefficients results in solving a set of linear algebraic equations that mustbe carrid out by means of a matrix pseudoinversion. In cavitated areas it is assumed ( and confirmed by the measurements ) that pressure of the medium remains constant. The equation of motion is nonlinear and therefore for its solution a

Název v anglickém jazyce

Investigation of lateral vibration of rotors supported by long fluid film bearings of non-circular cross section induced by kinematic excitation

Popis výsledku anglicky

One possibility how to decrease lateral vibration of rotors that is induced by their foundation movement is to couple the shaft with the stationary part through fluid film bearings. In computational models they are usually incorporated by means of nonlinear force couplings. To determine radial and tangential components of the hydraulical force a pressure function that describes the oil pressure distribution in the bearing gap must be known. This requires to solve a Reynolds' equation. If the bearings are long and of non-circular cross section, a numerical approach must be used. For this purpose a trigonometric collocation method has been proposed. Calculatuion of the Fourier coefficients results in solving a set of linear algebraic equations that mustbe carrid out by means of a matrix pseudoinversion. In cavitated areas it is assumed ( and confirmed by the measurements ) that pressure of the medium remains constant. The equation of motion is nonlinear and therefore for its solution a

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 4th International Conference on Structural Dynamics, EURODYN 2002

ISBN

90-5809-511-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

729-734

Název nakladatele

TU München

Místo vydání

München

Místo konání akce

München

Datum konání akce

2. 9. 2002

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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