稳健性(进化)
离散化
各向异性
散射
豪斯多夫距离
材料科学
物理
数学
光学
数学分析
化学
生物化学
基因
作者
Yuan Liu,Shuanglin Guo,Xiaobin Hong,Wei Shi,Zhen Hua Chen,Yao Chen,Qiufeng Li,Chao Lü
出处
期刊:Measurement
[Elsevier]
日期:2023-08-01
卷期号:218: 112991-112991
标识
DOI:10.1016/j.measurement.2023.112991
摘要
Aiming at health monitoring for anisotropic anti-corrosion structure of rim-driven thruster (RDT), a discrete non-elliptical probability imaging (DNEPI) based on ultrasonic guided waves is proposed. The elliptical location without analytical solution for anisotropic structures is analyzed theoretically. Through reverse thinking, it’s avoided by discretization and introducing reference point. Combined with Hausdorff damage sensitivity index (DSI), the damage probability is estimated. All paths’ probability is fused and displayed by images. The proposed DNEPI is verified by experiments. The results show that the damage probability energy ratios (Er) of DNEPI (Hausdorff DSI and scattering DSI) and elliptical probability imaging (EPI) are 0.29%, 0.22%, and 0.26% respectively, and improved to 4.55%, 1.89%, and 1.10% with 95% threshold. Compared with EPI, the Er of DNEPI imaging is improved by 3.45%. The robustness of Hausdorff DSI is better than scattering DSI. The proposed DNEPI not only visually presents the damage but also provides higher accuracy.
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