Vibration Analysis of a Rotor With Multiple Flexible Disks Using Assumed Modes Method

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, cent...

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Bibliographic Details
Published in:Journal of vibration and acoustics 1998-01, Vol.120 (1), p.87-94
Main Authors: Lee, Chong-Won, Chun, Sang-Bok
Format: Article
Language:English
Subjects:
Applied sciences
Drives
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mechanical engineering. Machine design
Physics
Shafts, couplings, clutches, brakes
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
Vibrations and mechanical waves
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Summary: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.
ISSN:1048-9002
1528-8927
DOI:10.1115/1.2893831