文献类型：期刊文献

英文题名：Researches on defect localization based on discrete ellipse imaging algorithm for curved plates

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

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2019

卷号：175

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20192907205015);WOS:【SCI-EXPANDED(收录号:WOS:000483657500014)】；

基金：The authors are grateful for the support of Natural Science Foundation of China (No.51575185).

语种：英文

外文关键词：Curved plates; Discrete ellipse imaging algorithm; Imaging accuracy; Zero-signal filling

摘要：Discrete ellipse imaging algorithm based on Lamb waves is widely applied in defect detection for plate-like structures. In this paper, the effectiveness of discrete ellipse imaging algorithm for the defect detection in curved plates has been investigated experimentally. The experiment with different sensor arrays and different numbers of sensors has been conducted. Experimental results show that the sparse array has a better imaging accuracy and the imaging accuracy improves as the number of sensor increases. The localization results show that the location of defect cannot been confirmed accurately. To improve the imaging accuracy, a novel method based on zero-signal filling is proposed in this paper. The experimental results show that the novel method can improve the imaging accuracy in curved plates effectively.