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	Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform
	Liu, Yu ; Li, Zheng ; Gong, Kezhuang
	2012
关键词	Radial crack Guided circumferential wave Gabor wavelet PZT sensors CIRCULAR ANNULUS DAMAGE IDENTIFICATION CYLINDERS SENSORS PIPES
DOI	10.1016/j.ymssp.2012.01.020
英文摘要	A quantitative identification method for radial cracks based on the guided circumferential wave (GCW) and continuous wavelet transform (CWT) is proposed in this research. The Gabor wavelet is used to extract a proper frequency component of a beneficial wave mode for evaluation of crack from the highly dispersive and multi-mode waves. The GCW components with different frequencies are considered and their effectiveness in crack detection is compared. Both numerical simulations and experiments are conducted on a Plexiglas annulus with a radial crack. Results show that the crack location is determined with high precision using the CWT to extract an appropriate GCW component, and the 1st mode corresponding to the Rayleigh surface wave is more reliable in crack detection than other modes under investigation. Furthermore, a GCW component with too low a frequency involves overlapping of waves and insensitivity to damages while that with too high a frequency has small amplitude and is complicated with many wave modes. Thus a wave component which simultaneously has adequate amplitude and good sensitivity is proven to be effective for examination of crack. (C) 2012 Elsevier Ltd. All rights reserved.; Engineering, Mechanical; SCI(E); EI; 0; ARTICLE; 157-167; 30
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/233091]
专题	工学院
推荐引用方式 GB/T 7714	Liu, Yu,Li, Zheng,Gong, Kezhuang. Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform[J],2012.
APA	Liu, Yu,Li, Zheng,&Gong, Kezhuang.(2012).Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform..
MLA	Liu, Yu,et al."Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform".(2012).

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