Guided Wave Tomography of Surface Defects Based on the Method of Moments,Advanced Theory and Simulations

当前位置： X-MOL 学术 › Adv. Theory Simul. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Guided Wave Tomography of Surface Defects Based on the Method of Moments
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2023-04-17 , DOI: 10.1002/adts.202300121
Zhi Qian ₁ , Bin Wang ₁ , Yinghong Zhang ₂ , Songhao Wang ₂ , Peng Li ₁ , Zhenghua Qian ₁ , Iren Kuznetsova ₃

Affiliation

The detection and evaluation of corrosion, cracks, flaws, and other imperfections in aged structures are critical for enhancing safety and evaluating residual service life in structural health monitoring (SHM) and nondestructive testing (NDT). A guided wave tomography based on the method of moments (MOM) for exact detection of the surface defects in plates, including their profile, size, and position is proposed in this paper. The mathematical relationship between the plate thickness and the objective function is derived theoretically for the A0 mode. Based on the obtained relationship, a plate thickness imaging technique is proposed. The efficiency of the proposed technique is confirmed by the results of numerical simulation and experimental data. Center and off-center surface defects are considered. 64 probes are evenly distributed in a circle outside the defect to capture omnidirectional wave signals. Both numerical and experimental results demonstrate that the guided wave tomography proposed can effectively reconstruct the spatial plate thickness distribution, enabling the precise identification of the defect's shape, depth, and position. The qualitative analysis and quantitative data provide effective guidance for NDT or SHM technologies in engineering.

中文翻译：

基于矩量法的表面缺陷导波层析成像

老化结构中的腐蚀、裂纹、缺陷和其他缺陷的检测和评估对于增强安全性和评估结构健康监测 (SHM) 和无损检测 (NDT) 中的剩余使用寿命至关重要。本文提出了一种基于矩量法（MOM）的导波断层扫描技术，用于精确检测板材的表面缺陷，包括其轮廓、尺寸和位置。针对A0模式，从理论上推导了板厚与目标函数之间的数学关系。基于所获得的关系，提出了板厚成像技术。数值模拟和实验数据的结果证实了该技术的有效性。考虑中心和偏心表面缺陷。64个探头均匀分布在缺陷外一圈，捕捉全向波信号。数值和实验结果表明，所提出的导波层析成像可以有效地重建空间板厚度分布，从而能够精确识别缺陷的形状、深度和位置。定性分析和定量数据为工程中的NDT或SHM技术提供了有效的指导。

更新日期：2023-04-17

点击分享查看原文

点击收藏

阅读更多本刊最新论文