Title :
Investigation on interaction of Lamb waves and circumferential notch in pipe by means of wavelet transform
Author :
Sun, Zongqi ; Mao, Yiwei ; Jiang, Wenliua ; De Zhang
Author_Institution :
Inst. of Acoust., Nanjing Univ., China
Abstract :
Mode analysis of Lamb waves propagating in an aluminum alloyed pipe is carried out using wavelet transform (WT). With the aid of the technique the interaction of Lamb waves with a circumferential notch is investigated. It is found that different Lamb wave modes propagating in the pipe can be distinguished clearly by means of wavelet transformation. Therefore, the mode conversion caused by existence of the notch has been unambiguously observed
Keywords :
acoustic signal processing; surface acoustic waves; ultrasonic materials testing; wavelet transforms; Lamb wave; aluminum alloy pipe; circumferential notch; mode conversion; nondestructive evaluation; signal processing; wavelet transform; Acoustic waves; Continuous wavelet transforms; Frequency; Inspection; Oscilloscopes; Probes; Sampling methods; Signal processing; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922670
