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Vibration of unbalanced rotors supported by long segment bearings taking into account air dissolved in the lubricant

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F03%3A00007995" target="_blank" >RIV/61989100:27230/03:00007995 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Vibration of unbalanced rotors supported by long segment bearings taking into account air dissolved in the lubricant

  • Original language description

    Application of long segment hydrodynamical bearings increases attenuation and stability limit of lateral vibration of rotors. In real technological conditions the lubricating oil contains air bubbles which can significantly influence dynamical behaviourof the whole system. Incorporation of this phenomenon into the computational models requires to determine dependence of the lubricant density on pressure. The pressure distribution in the bearing gap is described by a Reynolds' equation valid for compressible media. A finite difference method applied for its solving arrives at a set of differential equations that are consequently transformed into a set of nonlinear algebraic ones. Solution of the equation of motion is performed by menas of a modified Newmark method. Advantage of the introduced transformation consists in possibility to separate calculation of the pressure distribution in the bearings from solving the equation of motion of the rotor system.

  • 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

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2003

  • 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 16th Nordic Seminar on Computational Mechanics

  • ISBN

    82-7482-066-5

  • ISSN

  • e-ISSN

  • Number of pages

    4

  • Pages from-to

    49-52

  • Publisher name

    NTNU Trondheim

  • Place of publication

    Trondheim

  • Event location

    Trondheim

  • Event date

    Oct 16, 2003

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article