NDLI: Multidimensional Model of a Viscoelastic Sliding Bearing Support

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ja´uregui-Correa, J. C. Urbiola-Soto, L. Aboites-Da´vila, F.
Copyright Year	2005
Abstract	A multidimensional finite element model of a viscoelastic sliding bearing is presented. The model resulted into a simplified finite element model composed by an elastic matrix and a damping matrix. These matrices are independent from each other since the viscoelastic material properties are assumed to be of Kelvin type material. Kelvin type materials are approximated as a linear combination of an elastic modulus and a viscous coefficient. This simple model describes accurately most rubbers used in machine components. The model combines the linearity of the Kelvin type material plus the finite element interpolation scheme. Thus, the advantages of the finite element discretization can be applied to any geometry. In order to obtain Kelvin’s coefficients a test rig was built. Material properties were experimentally determined and the model was validated. Afterwards, a discretized model was developed for a radial support bearing with and embedded sandwich-like rubber band. From this model, it was possible to analyze bearing stiffness and damping properties. Then, damping and stiffness coefficients were input to a rotordynamic model of a single-mass rotor with a slender shaft to assess imbalance response characteristics obtained with viscoelastic sliding bearings. This procedure allows the designer to evaluate alternative damping mechanisms that can be added to sliding bearings.
Sponsorship	International Gas Turbine Institute
Starting Page	477
Ending Page	482
Page Count	6
File Format	PDF
ISBN	0791847276
DOI	10.1115/GT2005-68899
e-ISBN	0791837548
Volume Number	Volume 4: Turbo Expo 2005
Conference Proceedings	ASME Turbo Expo 2005: Power for Land, Sea, and Air
Language	English
Publisher Date	2005-06-06
Publisher Place	Reno, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Damping Multidimensional Viscoelastic material Bearing Bearings Viscoelastic materials
Content Type	Text
Resource Type	Article

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