Abstract: This paper investigates the
effects of pad and pivot elastic deformations on tilting pad
journal bearing properties and dynamic behavior of rotor system
supported on them. Small harmonic oscillations are assumed in
deriving the dynamic EHL equations of individual pads and the
formulae of pad dynamic properties. Numerical solution and
integration are used to get properties of elastically deformable
pads. A database of deformable pad properties covering a wide
range of practical parameters is set up. It is further
transformed to account for pivot deformations. "Assembling"
process is used to get bearing properties form the pad database.
The minimum film thickness, bearing stiffness, and especially
bearing damping, are seen to be significantly affected by pad
and pivot deformations. Effects of elastic deformations on rotor
system dynamic behavior are shown to be adverse, and
unnegligible under circumstances.
Key words:
Bearing Fluid Lubrication Dynamics
Deformation
Manuscript received on June
15, 1992
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