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

[+] Author and Article Information
Chong-Won Lee

Center for Noise and Vibration Control, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town, Taejon, 305-701, Korea

Sang-Bok Chun

Korea Power Engineering Company, R&D Center, P.O. Box 631, Seoul, Korea

J. Vib. Acoust 120(1), 87-94 (Jan 01, 1998) (8 pages) doi:10.1115/1.2893831 History: Received August 01, 1995; Revised February 01, 1996; Online February 26, 2008


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.

Copyright © 1998 by The American Society of Mechanical Engineers
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