文献类型：期刊文献

英文题名：Detection and localization of corrosion using the combination information of multiple Lamb wave modes

作者：Huang, Liping[1];Luo, Zhi[2];Zeng, Liang[3];Lin, Jing[4]

机构：[1]Xian Univ Sci & Technol, Sch Mech Engn, Xian 710054, Shaanxi, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Shaanxi, Peoples R China;[4]Beihang Univ, Sch Reliabil & Syst Engn, Beijing 100191, Peoples R China

年份：2024

卷号：138

外文期刊名：ULTRASONICS

收录：;EI(收录号：20240615519499);WOS:【SCI-EXPANDED(收录号:WOS:001178045900001)】；

基金：The work is supported by the National Natural Science Foundation of China (Grant No. 52105122, 52205151) , the China Postdoctoral Science Foundation (Grant No. 2021 M693882) and Shanghai Sailing Program (Grant No. 22YF1409900) , which are highly appreciated by the authors.

语种：英文

外文关键词：Lamb waves; Corrosion detection; Multiple Lamb modes; Baseline-free; Time-of-flight

摘要：The multi-mode and dispersion nature of Lamb waves means that a variety of modes with individual mode structures and distinct dispersion behaviors would propagate in the structures simultaneously. The existence of a corrosion would result in thickness reduction, which means the frequency-thickness product under a specific excitation would also decrease. Due to dispersion diversity, the interaction of each individual Lamb mode at the corrosion may be distinct, i.e., the velocity varies in different extent and even in opposite trends. In this paper, the combination of multiple modes, rather than a single sensitive mode, is used for structure diagnosis. Specifically, two Lamb modes both sensitive to corrosion but with opposite variation trends are taken and the corrosion index is defined on the ratio of their time-of-flight, so as to enhance the sensitivity to corrosion and eliminate the influence of difference path lengths in the sensor network. On this basis, a probabilistic reconstruction algorithm is introduced for corrosion detection and localization. Since the two modes are extracted from the same wideband Lamb wave response, the proposed method is baseline-free. The influence of mode conversion on the effectiveness of the proposed method is discussed. Ultimately, the performance of the proposed method is demonstrated by an experimental example. The results show that the defect could be correctly identified and accurately localized.