Identification of dynamic properties of radial air-foil bearings

Arora, V. and Hoogt van der, P.J.M. and Aarts, R.G.K.M. and Boer de, A. (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
Copyright:	© 2010 The Author(s)
Faculty:	Engineering Technology (CTW)
Research Chair:	Structural Dynamics and Acoustics (SD&A)
Research Group:	Mechanical Automation and Mechatronics
Link to this item:	http://purl.utwente.nl/publications/75419
Official URL:	http://dx.doi.org/10.1007/s10999-010-9137-z
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