On the stability of cracked rotor systems
Author(s)
Author(s)
Zheng, G. T.
Date Issued
1998
Publisher
The Chinese Society of Mechanical Engineers
Journal
Journal of the Chinese Society of Mechanical Engineers
Volume
19
Issue
1
Start page
125
End page
133
Abstract
The stability of cracked rotor systems is studied from the aspect of input-output stability and system stability. The system stability describes the influence of the size and the position of a fatigue crack on the stability. The input-output stability represents the influence of rotating speeds together with natural frequencies of the system on the stability. By introducing the concept of virtual oil-film bearing, reasons for the system instability is interpreted. It is suggested that fatigue crack is an important reason for the existence of lower frequency vibration components in some turbo-machines and a small fatigue crack may drive a system into instability in a very short time. One numerical example and one experiment example are presented at the end of the paper.
SFU Affiliated Publication
No
Availability at SFU Library
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