文献类型：期刊文献

英文题名：An improved discrete elliptic imaging algorithm based on guided waves for defect localisation in curved plates

作者：Hu, Gangyi[1];Chen, Shaojie[1];Chen, Chaofeng[1];Zhai, Shuangmiao[1];Zhou, Shaoping[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：61

期号：11

起止页码：656

外文期刊名：INSIGHT

收录：;EI(收录号：20194807731068);WOS:【SCI-EXPANDED(收录号:WOS:000499084800008)】；

基金：The authors are grateful for the financial support of the National Natural Science Foundation of China (No 51575185). The authors would also like to thank Professor Wenjun Zhang from the University of Saskatchewan for providing helpful proof reading.

语种：英文

外文关键词：curved plate structure; defect localisation; elliptic imaging algorithm; guided waves

摘要：Many effective image-based algorithms are available for detecting and locating defects in flat plate-like structures. However, there are few studies on image-based algorithms for curved plate structures. An improved method is proposed in this article, which is based on the discrete elliptic imaging algorithm and the improved signal normalisation method. To verify its effectiveness, experiments using a circular array are conducted on curved plates with different degrees of bending. The experimental results show that the improved method can accurately locate defects in curved plates and, compared with the original discrete elliptic imaging algorithm, its range of error in locating a single defect is reduced from 20.2-33.3 mm to 2.7-5.1 mm.