Identification of dynamic properties of radial air-foil bearings


Arora, V. and Hoogt, P.J.M. van der and Aarts, R.G.K.M. and Boer, A. de (2010) Identification of dynamic properties of radial air-foil bearings. International Journal of Mechanics and Materials in Design, 6 (4). pp. 305-318. ISSN 1569-1713

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Abstract:Air-foil bearings (AFBs) are self acting
hydrodynamic bearings made from sheet metal foils
comprised of at least two layers. The innermost ‘‘top
foil’’ layer traps a gas pressure film that supports a
load while the layer or layers underneath provide an
elastic foundation. Air-foil bearings are currently used
in many commercial applications, both terrestrial and
aerospace. Air-foil bearings provide a means to
eliminate the oil system leading to reduce weight
and enhanced temperature capability. Regardless of
the application of the air-foil bearings, the identification
of the dynamic characteristics is important for
successful design practice. In the present work,
stiffness and damping of radial air-foil bearings are
indentified in the light of experimental results. Due
to the initial high torque requirement of the air-foil
bearing, the experimental setup using single air-foil
bearing is proposed instead of standard two-foil bearing
setups. Experiments are carried out at maximum
speed of 60,000 rpm. Sub-structuring approach is
used for identification of stiffness and damping
properties of the air-foil bearings. The results have
shown that the developed experimental procedure is
able to indentify the stiffness and damping properties
of radial air-foil bearings accurately.
Item Type:Article
Additional information:Open Access
Copyright:© 2010 The Author(s)
Engineering Technology (CTW)
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