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Proceedings Paper

Acoustic emission monitoring of stayed cables based on wavelet analysis
Author(s): Ting Jin; Zhi Sun; Li-Min Sun
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Paper Abstract

Recent disease surveys on some cable-supported bridges show that cable corrosion is one of the main dangers for bridge safety, serviceability and durability. Since cables are the main supporting components for these bridges, this type of damage must be detected at the earliest possible stage for further maintenance. Acoustic monitoring technique shows an efficient way for this purpose. This paper presents such a research on modeling and wavelet analyzing the acoustic emission signal in seven-wire strands for damage diagnosis. In order to demonstrate the accuracy of the proposed technique, the propagation of the guided waves in a cylindrical bar is examined firstly. These modeling results are compared to some analytical results. The comparisons clearly illustrate the effectiveness of the guided wave propagation modeling technique and verify the potential of the modeling technique on solving those problems whose analytical solution is not available due to the complexity of the component geometry. The modeling technique is then used to generate the wave samples for two damage conditions of the seven-wire strands and a wavelet based pattern extraction technique is adopted to extract the baseline time-frequency characteristics of the wave.

Paper Details

Date Published: 8 April 2008
PDF: 7 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 693236 (8 April 2008); doi: 10.1117/12.776438
Show Author Affiliations
Ting Jin, Tongji Univ. (China)
Zhi Sun, Tongji Univ. (China)
Li-Min Sun, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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