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Nonlinear Dynamic Behaviors of Rotated Blades with Small Breathing Cracks Based on Vibration Power Flow Analysis
Joint Authors
Xiong, Y. P.
Chen, Zhongsheng
Yang, Yongmin
Xu, Hailong
Tao, Limin
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-02
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Rotated blades are key mechanical components in turbomachinery and high cycle fatigues often induce blade cracks.
Accurate detection of small cracks in rotated blades is very significant for safety, reliability, and availability.
In nature, a breathing crack model is fit for a small crack in a rotated blade rather than other models.
However, traditional vibration displacements-based methods are less sensitive to nonlinear characteristics due to small breathing cracks.
In order to solve this problem, vibration power flow analysis (VPFA) is proposed to analyze nonlinear dynamic behaviors of rotated blades with small breathing cracks in this paper.
Firstly, local flexibility due to a crack is derived and then time-varying dynamic model of the rotated blade with a small breathing crack is built.
Based on it, the corresponding vibration power flow model is presented.
Finally, VPFA-based numerical simulations are done to validate nonlinear behaviors of the cracked blade.
The results demonstrate that nonlinear behaviors of a crack can be enhanced by power flow analysis and VPFA is more sensitive to a small breathing crack than displacements-based vibration analysis.
Bifurcations will occur due to breathing cracks and subharmonic resonance factors can be defined to identify breathing cracks.
Thus the proposed method can provide a promising way for detecting and predicting small breathing cracks in rotated blades.
American Psychological Association (APA)
Xu, Hailong& Chen, Zhongsheng& Xiong, Y. P.& Yang, Yongmin& Tao, Limin. 2016. Nonlinear Dynamic Behaviors of Rotated Blades with Small Breathing Cracks Based on Vibration Power Flow Analysis. Shock and Vibration،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1119144
Modern Language Association (MLA)
Xu, Hailong…[et al.]. Nonlinear Dynamic Behaviors of Rotated Blades with Small Breathing Cracks Based on Vibration Power Flow Analysis. Shock and Vibration No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1119144
American Medical Association (AMA)
Xu, Hailong& Chen, Zhongsheng& Xiong, Y. P.& Yang, Yongmin& Tao, Limin. Nonlinear Dynamic Behaviors of Rotated Blades with Small Breathing Cracks Based on Vibration Power Flow Analysis. Shock and Vibration. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1119144
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119144