Probabilistic Diagnostic Algorithm-Based Damage Detection for Plates with Non-uniform Sections Using the Improved Weight Function
Probabilistic Diagnostic Algorithm-Based Damage Detection for Plates with Non-uniform Sections Using the Improved Weight Function
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DOI：
10.1007/s42417-018-0032-5
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发表时间：
2018-06
影响因子：
2.7
通讯作者：
Jingjing Zhao;Xiaoting Miao;Fucai Li;Hongguang Li
中科院分区：
文献类型：
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作者：
Jingjing Zhao;Xiaoting Miao;Fucai Li;Hongguang Li
目前基于导波的损伤检测研究主要集中在等截面板状结构上。然而，具有非均匀截面的板在某些工程应用中也是必不可少的结构，例如船舶、桥梁、飞机和建筑物。非均匀截面板（NUSPs）中的损伤识别是一项十分重要的工作，目的对概率损伤检测重建算法（RAPID）进行改进，使其在NUSPs上具有可行性。基于从未损坏（参考）和损坏（当前）状态捕获的兰姆波信号之间的差异的损伤签名用于评估损伤的概率。RAPID算法中常用的椭圆权函数限制了该方法在变截面板损伤识别中的应用。在这项研究中，提出了一种新的方法来选择权函数，不仅满足等截面板，但也NUSP。一系列的铝板上进行的实验，以验证上述方法的正确性。ConclusionThe结果表明，改进显着提高了NUSPs的损伤定位精度。
IntroductionThe current studies on damage detection based on guided wave mainly focus on uniform-section plate-like structures. However, plates with non-uniform sections are also essential structures in some engineering applications, such as ships, bridges, aircraft, and buildings. It is essential to identify damage in the non-uniform-section plates (NUSPs).ObjectivesAn improvement is put forward to make reconstruction algorithm for the probability inspection of damage (RAPID) feasible on NUSPs.MethodsReconstruction algorithm for the probability inspection of damage (RAPID) is a promising kind of tomography technique for detection and supervising of structures. The damage signatures based on the differences between the Lamb wave signals captured from the undamaged (reference) and damaged (present) states are used to assess the probability of the damage. The elliptical weight function commonly used in the RAPID algorithm limits the applications of the method in identifying damage in non-uniform-section plates. In this study, a novel method is proposed to choose the weight function that satisfies not only uniform-section plates but also NUSPs. A series of experiments on aluminum plates are carried out to validate the correctness of the method mentioned before.ConclusionThe results indicate that the improvement considerably increases the precision of the localization of damage in NUSPs.