Analytical Formulation of Friction Interface Elements for Analysis of Nonlinear Multi-Harmonic Vibrations of Bladed Disks

[+] Author and Article Information
E. P. Petrov, D. J. Ewins

Imperial College of Science, Technology and Medicine, Center of Vibration Engineering, Mechanical Engineering Department, London SW7 2BX, UK

J. Turbomach 125(2), 364-371 (Apr 23, 2003) (8 pages) doi:10.1115/1.1539868 History: Received January 22, 2002; Online April 23, 2003
Copyright © 2003 by ASME
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Friction interface element
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Forced response for different gap values
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Influence of stiffness coefficient, ky, on forced response for different gap values: (a) g=5; (b) g=0; (c) g=−5
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Forced response for different values of static component in the variable normal load
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Forced response of the system with friction damper for different amplitudes of the normal load variation
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Amplitudes of harmonic components of the multiharmonic motion (case of fy=300+400 cos τ)
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Illustration of the computational efficiency
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Forced response of 2DOF system with the friction damper
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Finite element model of a sector of a high-pressure turbine-bladed disk and nodes of friction contact
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Natural frequencies of the bladed disk analyzed
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Forced response of the high-pressure turbine-bladed disk with a friction damper (solid line) and without a friction damper (dashed line) for different numbers of engine orders




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