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TECHNICAL PAPERS

Experimental Analysis of Cracked Rotor

[+] Author and Article Information
Tong Zhou

 Institute of Structural Mechanics, China Academy of Engineering Physics, 919-402#, Mianyang 621900, P.R. China and The School of Architectural Engineering and Mechanics, Xi’an Jiaotong University, Xi’an, 710049, P.R. Chinazhouyuxian@hotmail.com

Zhengce Sun

 China Classification Society, Offshore Engineering Department, Beijing, 10006, P.R. China and The School of Architectural Engineering and Mechanics, Xi’an Jiaotong University, Xi’an 710049, P.R. Chinaszc1111@263.net

Jianxue Xu

The School of Architectural Engineering and Mechanics, Xi’an Jiaotong University, Xi’an 710049, P.R. Chinajxxu@mail.xjtu.edu.cn

Weihua Han

Institute of Technology, China Academy of Engineering Physics, Mianyang 621900, P.R. China

J. Dyn. Sys., Meas., Control 127(3), 313-320 (Jul 17, 2004) (8 pages) doi:10.1115/1.1978908 History: Received August 17, 2003; Revised July 17, 2004

The dynamic behavior of a cracked rotor has been theoretically analyzed by many researchers. In this paper, an experimental confirmation of the theoretical results is sought, especially for the nonlinear dynamic behavior of the cracked rotor. The crack in the rotor was simulated by a real fatigue crack, instead of a narrow slot. It can be seen from the orbit and spectrum of the rotor’s center that the effect of the crack becomes obvious only if the crack is deep enough. The experimental result conforms to theoretical analysis very well.

Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

The experimental system

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Figure 3

Cross section of the fatigue crack

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Figure 4

Vibration signal (x solid line, y dash line) and orbit of the No. 1 shaft

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Figure 5

Vibration signal (x solid line, y dash line) and orbit of the No. 2 shaft

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Figure 6

Vibration signal (x solid line, y dash line) and orbit of the No. 3 shaft

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Figure 7

Effect of different eccentricity

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Figure 8

Effect of the angle

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Figure 9

Waterfall of a shaft with open crack

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Figure 10

Vibration signal of the No. 1 shaft near the bearing

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Figure 11

Vibration signal of the No. 3 shaft near the bearing

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Figure 12

Vibration signal and spectrum of the No. 1 shaft

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Figure 13

Vibration signal and spectrum of the No. 2 shaft

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Figure 14

Vibration signal and spectrum of the No. 3 shaft

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Figure 15

Vibration signal and spectrum of the No. 1 shaft when passing through critical speed

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Figure 16

Vibration signal and spectrum of the No. 3 shaft when passing through critical speed

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