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TECHNICAL PAPERS

Measurements and Correlations of Slider Vibrations and Wear

[+] Author and Article Information
M. D. Bryant

Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712-1063

David York

Boeing, 13100 Space Center Blvd, Houston, TX 77059

J. Tribol 122(1), 374-380 (May 11, 1999) (7 pages) doi:10.1115/1.555363 History: Received October 23, 1998; Revised May 11, 1999
Copyright © 2000 by ASME
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References

Figures

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Nondimensional difference ΔWR between Fig. 2 wear rates for snug fit and Cx-350 (triangles) and Cz-450 (open squares), versus respective nondimensional vibration energy differences ΔE extracted from Figs. 456. Numbers indicate rotor speeds (RPM). The data clusters about a regression line ΔWR=−0.12+1.02ΔE.
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Total kinetic energy per mass (J kg−1 ) extracted from Figs. 456, versus speed (RPM), for snug (solid curve), Cz-450 (long dashes), and Cx-350 (short dashes)
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Kinetic energy per mass (J kg−1 ) versus speed (RPM) extracted from Figs. 5 with clearance Cz-450. The curves are total kinetic energy E (solid curve); Ex (long dashes); Ez (long-short dashes); and Ey (short dashes).
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Displacements Ny,Nx (θz), and Nz (θx) (μm) versus time, with associated spectral density plots, for the Cx-350 clearance trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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Displacements Ny,Nx (θz), and Nz (θx) (μm) versus time, with associated spectral density plots, for the Cx-450 clearance trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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Displacements Ny,Nxz), and Nzx)(μm) versus time, with associated spectral density plots for the snug fit trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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(a) Surface profile of the circular sliding track versus distance (degrees) before any sliding. (b) Amplitudes of Fourier series harmonics (μm) versus harmonic number for the profile of (a), featuring enhanced harmonics 3 and 4.
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Wear rate versus sliding speed, with sample to sample holder clearance (μm) a parameter for snug fit (solid curve), Cx-350 (long dashes), and Cz-450 (short dashes)
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Carbon sample in holder. Clearances Cx and Cz (directed along z) permit rocking rotations θz and θx, respectively. A capacitance gauge measured slider displacements Nx,Ny, and Nz via the screw.

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