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

The result's identifiers

  • Result code in 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>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

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

  • Original language description

    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

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    JR - Other machinery industry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA101%2F02%2F0011" target="_blank" >GA101/02/0011: New approach to the analysis of dynamic behaviour of nonlinear coupling elements using in rotor dynamic systems</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2002

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    Proceedings of the 4th International Conference on Structural Dynamics, EURODYN 2002

  • ISBN

    90-5809-511-8

  • ISSN

  • e-ISSN

  • Number of pages

    6

  • Pages from-to

    729-734

  • Publisher name

    TU München

  • Place of publication

    München

  • Event location

    München

  • Event date

    Sep 2, 2002

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article