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Vibration response mechanism of faulty outer race rolling element bearings for quantitative analysis

Author(s)
Cui, LingliZhang, YuZhang, FeibinZhang, JianyuLee, Seungchul
Issued Date
2016-03
DOI
10.1016/j.jsv.2015.10.015
URI
https://scholarworks.unist.ac.kr/handle/201301/18080
Fulltext
http://www.sciencedirect.com/science/article/pii/S0022460X15008512
Citation
JOURNAL OF SOUND AND VIBRATION, v.364, pp.67 - 76
Abstract
For the quantitative fault diagnosis of rolling element bearings, a nonlinear vibration model for fault severity assessment of rolling element bearings is established in this study. The outer race defect size parameter is introduced into the dynamic model, and vibration response signals of rolling element bearings under different fault sizes are simulated. The signals are analyzed quantitatively to observe the relationship between vibration responses and fault sizes. The impact points when the ball rolls onto and away from the defect are identified from the vibration response signals. Next, the impact characteristic that reflects the fault severity in rolling element bearings is obtained from the time interval between two impact points. When the width of the bearing fault is small, the signals are presented as clear single impact. The signals gradually become double impacts with increasing size of defects. The vibration signals of a rolling element bearings test rig are measured for different outer race fault sizes. The experimental results agree well with the results from simulations. These results are useful for understanding the vibration response mechanism of rolling element bearings under various degrees of fault severity. (C) 2015 Elsevier Ltd. All rights reserved
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
ISSN
0022-460X
Keyword (Author)
Rolling elementbearingsvibration responsequantitative analysisfault diagnosis
Keyword
LOCAL DAMAGE DETECTIONDYNAMIC-MODELBALL-BEARINGDISTRIBUTED DEFECTSCONTACT FORCESDIAGNOSISSIMULATIONCOMPLEXITYSIGNALSGEAR

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