Engineering Mechanics

International Conference

Proceedings Vol. 25 (2019)


ENGINEERING MECHANICS 2019

25th INTERNATIONAL CONFERENCE
May 13 – 16, 2019, Svratka, Czech Republic
;
Editors: Igor Zolotarev and Vojtěch Radolf

Copyright © 2019 Institute of Thermomechanics of the Czech Academy of Sciences, Prague

ISBN 978-80-87012-71-0 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

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SUB-SYNCHRONOUS VIBRATIONS OF A ROTOR SUPPORTED ON POORLY LUBRICATED JOURNAL BEARINGS
Smolík L., Polach P., Rendl J.:
pages 339 - 342, full text

This paper aims to the modelling and investigation of sub-synchronous vibrations of a rotor supported on poorly lubricated journal bearings. Bores for an oil supply are located in the lower halves of bearing shells. It is shown that the poor lubrication of the described bearings may lead to an occurrence of stable vibrations at the frequency ca. 0.9 to the rotor speed. Simulations are performed using a multi-body approach for modelling rotating systems. Forces acting in journal bearings are evaluated employing a massconserving finite element solution of the Reynolds equation.


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