Engineering Mechanics

Proceedings Vol. 7 (2001)

INŽENÝRSKÁ MECHANIKA 2001

ENGINEERING MECHANICS 2001

Copyright © 2001 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Prague

 

Zapoměl J.
pages 295 - +8p, full text

Eigenvalues and response on loadings of specified hime histories provide principal information on dynamical properties and behaviour of rotors supported by squeeze-film dampers or fluid-film bearings. In both cases the analysis starts from setting up and solving the equation of motion. The hydraulical forces through which the layers of lubricat act on the the rotor journals are determined from the oil pressure distribution in the gap between the inner and outer rings of the damper or the bearing. A procedure based on repeated linearization of fluid-film forces by means of their expansion into a Taylor series in the neighbourhood of the current position and modification of a Newmark method has been developed and tested. Inertia effects of the lubricant are included in the calculations. The proposed method is marked for good numerical stability.

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