A Unified Approach to Analyze Vibration of Axisymmetric Rotating Structures with Flexible Stationary Parts

[+] Author and Article Information
Chaw-Wu Tseng

Western Digital Corporation, San Jose, California 95138

Jr-Yi Shen

Hitachi Global Storage Technologies, San Jose, California 95193

Hyunchul Kim, I. Y. Shen

Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195-2600

J. Vib. Acoust 127(2), 125-138 (May 03, 2005) (14 pages) doi:10.1115/1.1857917 History: Received April 20, 2003; Revised April 13, 2004; Online May 03, 2005
Copyright © 2005 by ASME
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Position of A and G when the spindle is at rest and bearing is undeformed
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Experimental setup: ball-bearing spindle with a cylinder
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Input and Output location of the experimental measurements
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Input and Output location of the modal analysis
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Waterfall plot measured at LDV location 2 for speed ranging from 0 to 6000 rpm showing only unbalanced modes
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Mode shapes of (0,1) unbalanced modes at 0 rpm
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Mode shapes of (0,0) unbalanced modes at 0 rpm
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Waterfall plot measured at LDV location 1 for speed ranging from 0 to 6000 rpm showing both unbalanced and balanced modes
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Simplified model for a disk drive spindle
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Comparison of theoretical predictions and experimental measurements using the simplified model
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Finite element analyses revealing significant deformation of the rotating hub
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Prescribed rotational base excitation (γxyz) and linear base excitation s(t)
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Coordinate system for the rotating part
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Mode shapes of (0,2) and (0,3) balanced modes at 0 rpm
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FEA mesh of the stationary part
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FEA mesh of the rotating part
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Comparison of natural frequencies from the theory and experiments



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