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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1344

Title: Finite Element Modelling of Viscoelastic Rotors: An Operator Based Approach
Authors: Roy, H
Dutt, J K
Keywords: Viscoelastic rotor,
Internal damping,
Augmenting thermodynamic field,
Stability limit of spin speed,
Unbalance response.
Issue Date: Dec-2010
Citation: International Conference on Theoretical, Applied, Computational and Experimental Mechanics, December 27-29, 2010, IIT Kharagpur,
Abstract: Damping exists in every material in varying degrees. So materials in general are viscoelastic in nature.Modelling of viscoelastic materials is always difficult since such materials store energy as well as dissipate it to the thermal domain. This paper presents a theoretical study of the dynamics of a viscoelastic rotorshaft system, where the internal material damping in the rotor shaft introduces a rotary force well known to cause instability of the rotor-shaft system. For this the material constitutive relationship has been represented by a differential time operator. Use of operators enables to consider general linear viscoelastic behaviours, represented in the time domain, for which, in general, instantaneous stress and its derivatives are proportional to instantaneous strain and also its derivatives. The operator may be suitably chosen according to the material model. An efficient modelling technique for viscoelastic material augmenting thermodynamic field (ATF) has been found in l...
Description: Copyright belongs to Proceedings Publisher
URI: http://hdl.handle.net/2080/1344
Appears in Collections:Conference Papers

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