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TECHNICAL PAPERS

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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References

Childs, D., 1993, Turbomachinery Rotordynamics: Phenomena, Modeling, and Analysis, Wiley, New York.
Shen,  I. Y., and Ku,  C.-P. R., 1997, “A Non-Classical Vibration Analysis of Multiple Rotating Disks/Shaft Assembly,” ASME J. Appl. Mech., 64, pp. 165–174.
Shen,  I. Y., 1997, “Closed-Form Forced Response of a Damped, Rotating, Multiple Disk/Spindle System,” ASME J. Appl. Mech., 64, pp. 343–352.
Chen,  Y., Zhao,  H. B., Shen,  Z. P., Grieger,  I., and Kroplin,  B. H., 1993, “Vibrations of High-Speed Rotating shells with Calculations for Cylindrical Shells,” J. Sound Vib., 160, pp. 137–160.
Guo,  D., Chu,  F. L., and Zheng,  Z. C., 2001, “The Influence of Rotation on Vibration of a Thick Cylindrical Shell,” J. Sound Vib., 242, pp. 487–505.
Jintanawan,  T., and Shen,  I. Y., 2000, “Free Vibration of a Rotating Disk Pack and Spindle Motor System with Rotating Shaft Design,” J. Inf. Storage Process. Syst., 2, pp. 129–139.
Jintanawa,  T., Shen,  I. Y., and Tanaka,  K., 2001, “Vibration Analysis of Fluid Bearing Spindles with Rotating-Shaft Design,” IEEE Trans. Magn., 37, pp. 799–805.
Bansal, P. N., and Kirk, R. G., 1975, “Stability and Damped Critical Speeds of Rotor-Bearing Systems,” ASME J. Ind., pp. 1325–1332.
Gash,  R., 1976, “Vibration of Larger Turbo-Rotors in Fluid-Film Bearings on an Elastic Foundation,” J. Sound Vib., 47, pp. 53–73.
Fan,  U. J., and Noah,  S. T., 1989, “Vibration Analysis of Rotor Systems Using Reduced Subsystem Models,” J. Propul. Power, 5, pp. 602–609.
Rieger,  N. F., and Zhou,  S., 1998, “An Instability Analysis Procedure for Three-Level Multi-Bearing Rotor-Foundation Systems,” ASME J. Vibr. Acoust., 120, pp. 753–762.
Earles,  L. L., Palazzolo,  A. B., Lee,  C. K., and Gerhold,  C. H., 1988, “Hybrid Finite Element-Boundary Element Simulation of Rotating Machinery Supported on Flexible Foundation and Soil,” ASME J. Vibr. Acoust., 110, pp. 300–306.
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Vzquez,  J. A., Barrett,  L. E., and Flack,  R. D., 2001, “A Flexible Rotor on Flexible Bearing Supports: Stability and Unbalance Response,” ASME J. Vibr. Acoust., 123, pp. 137–144.
Tseng, C. W., Shen, J. Y., and Shen, I. Y., 2003, “Vibration of Rotating-Shaft HDD Spindle Motors with Flexible Stationary Parts,” IEEE Trans. Magn., (accepted for publication).

Figures

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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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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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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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