An assumed modes method is developed to investigate the effect of multiple flexible disks on the vibrational modes of a flexible rotor system. The analysis rotor model consists of multiple disks on a flexible shaft, as used for steam turbines or computer storage devices. In modeling the system, centrifugal stiffening and disk flexibility effects are taken into account. To demonstrate the effectiveness of the method, a hard disk drive spindle system commonly used in personal computers and a simple flexible rotor system with two disks are selected as examples. In particular, the dynamic coupling between the vibrational modes of the shaft and the duplicate disks is investigated with the shaft rotational speed varied.
Issue Section:
Research Papers
Topics:
Disks,
Rotors,
Vibration analysis,
Computers,
Vibrational modes,
Modeling,
Steam turbines,
Storage
1.
Chun
S. B.
Lee
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1996
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.2.
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6.
Lee, C. W., 1993, Vibration Analysis of Rotors, Kluwer Academic Publishers.
7.
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8.
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9.
Mote
C. D.
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,” ASME Journal of Engineering for Industry
, Vol. 87
, pp. 258
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.10.
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M.
Kimura
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Park
S. K.
Ohnabe
H.
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, “Vibration of Bladed Flexible Rotor due to Gyroscopic Moment
,” J. of Sound and Vibration
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.11.
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A. A. S.
Thomas
J.
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, “Coupling Effects of Disc Flexibility on the Dynamic Behavior of Multi Disc-Shaft Systems
,” J. of Sound and Vibration
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, pp. 435
–452
.12.
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13.
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14.
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15.
Wah
T.
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.16.
Wu
F.
Flowers
G. T.
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, “A Transfer Matrix Technique for Evaluating the Natural Frequencies and Critical Speeds of a Rotor with Multiple Flexible Disks
,” ASME JOURNAL OF VIBRATION AND ACOUSTICS
, Vol. 114
, pp. 242
–248
.17.
Wu
F.
Flowers
G. T.
1993
, “An Experimental Study of the Influence of Disk Flexibility and Rubbing on Rotordynamics
,” ASME Vibration of Rotating Systems
, DE-Vol. 60
, pp. 19
–26
.
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