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TECHNICAL PAPERS

Generic Friction Models for Time-Domain Vibration Analysis of Bladed Disks

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

Centre of Vibration Engineering, Mechanical Engineering Department, Imperial College London, South Kensington Campus, London SW7 2AZ, UK

J. Turbomach 126(1), 184-192 (Mar 26, 2004) (9 pages) doi:10.1115/1.1644557 History: Received December 01, 2002; Revised March 01, 2003; Online March 26, 2004
Copyright © 2004 by ASME
Topics: Force , Friction , Motion , Stress , Disks
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References

Figures

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Vectors of the friction force for different trajectories and normal load variation: (a) a case of an ellipse with the ratio of its axis lengths 2:1; (b) a case of an ellipse with the ratio 2:0.1
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Magnitude of the friction force vector for different trajectories: (a) fz=100; (b) fz=100+60 sin τ
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Trajectory of motion and vectors of the friction force for different levels of displacements
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Magnitude of the friction force vector for different levels of displacements
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Variation of the friction force as a function of radius of the minimum curvature
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Friction forces for different orientation of anisotropy axes for the friction coefficient, μ(φ): (a) friction force vector at different points of the trajectory; (b) magnitude of the friction vector
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Finite element model of the test rig, (a); and a patch where the blades have the friction contact interface, (b)
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Variation of displacement components over the time interval considered
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Calculated friction force: (a) as functions of time; (b) hysteresis loops for the whole time range for friction force component fy
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Effects of different choice of the constant, c: (a) on the sign function approximation; (b) on hysteresis loop shapes
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The friction force and hysteresis loops for different levels of the normal load variation: (a) fz=100; (b) fz=100+40 sin τ; (c) fz=100+80 sin τ
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Hysteresis loops for different phase values of the normal load variation: fz=100+80 sin(t+ϕ)
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Friction force with multiharmonic displacement and normal load variation
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Hysteresis loops for variable friction characteristics: (a) μ=1/3μ0(2+e−0.1τ);kt=k0; (b) μ=μ0;kt=1/3k0(2+e−0.1τ); (c) μ=1/3μ0(2+e−0.1τ) and kt=1/3k0(2+e−0.1τ)
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Friction contact interaction of rough surfaces
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Motion of the asperity model along a line
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Arbitrary planar motion of the asperity model

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