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Corrosion Monitoring Method of Porous Aluminum Alloy Plate Hole Edges Based on Piezoelectric Sensors

机译:基于压电传感器的多孔铝合金板孔边缘腐蚀监测方法

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摘要

Corrosion damage to the aircraft structure can significantly reduce the safety performance and endanger flight safety. Especially when the corrosion occurs in a stress concentration region, such as hole edges, it can easily threaten the entire structure. In this paper, an on-line imaging qualitative monitoring algorithm based on piezoelectric sensors is proposed for detecting hole edge corrosion damage of porous aluminum alloy structures. The normalized amplitude is used to characterize the correlation between the initial Lamb wave signal and the damage signal, which is as an image reconstruction parameter in the algebraic iterative probability reconstruction algorithm. Moreover, a homogenization algorithm is proposed to process the reconstruction results. The experimental results of single hole and double hole corrosion for porous aluminum alloy plate show that the method can effectively achieve the location and quantification of corrosion damage to one and two holes of the porous structure.
机译:飞机结构的腐蚀损坏会大大降低安全性能并危及飞行安全。特别是当腐蚀发生在应力集中区域(例如孔边缘)时,腐蚀很容易威胁到整个结构。提出了一种基于压电传感器的在线成像定性监测算法,用于检测多孔铝合金结构的孔边缘腐蚀损伤。归一化幅度用于表征初始兰姆波信号与损伤信号之间的相关性,这是代数迭代概率重建算法中的图像重建参数。此外,提出了一种均化算法来处理重建结果。对多孔铝合金板进行单孔和双孔腐蚀的实验结果表明,该方法可以有效地实现对多孔结构一孔和二孔腐蚀损伤的定位和量化。

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