Multi-type damage localization using the scattering coefficient-based RAPID algorithm with damage indexes separation and imaging fusion

IF 5.7 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Structural Health Monitoring-An International Journal Pub Date : 2023-08-10 DOI:10.1177/14759217231191267
Qiao Bao, Tian Xie, Weiwei Hu, Kai Tao, Qiang Wang
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Abstract

Guided waves-based structural health monitoring (SHM) methods have potential for practical applications, since they are sensitive to small damages and are able to realize large area monitoring. Among these methods, the Reconstruction Algorithm for Probabilistic Inspection (RAPID), using a Piezoelectric transducer (PZT) sensor array, is one of the most widely used imaging algorithms to perform active damage monitoring and localization. However, since the sensing paths are distributed inside the sensor array with the non-uniform density, the RAPID algorithm can only localize damage when it is occurring inside of the array. If the damage occurs outside of the array or both inside and outside of the array, that is, multi-type damage, the performance of RAPID algorithm would not be satisfactory. In this paper, a scattering coefficient-based RAPID algorithm with damage indexes separation and imaging fusion is proposed. The amplitude of damage scattered signal at the corresponding time of fight is adopted as the weight in the probability distribution function, and damage indexes are then classified into two categories in the RAPID algorithm for the inside and outside damage localization respectively. Finally, an experiment on the complex composite plate, with the center large hole and surrounding bolt holes, is carried out to verify this proposed method. Experimental results show that this method can realize multi-type damage localization with errors less than 40 mm.
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基于散射系数的RAPID损伤指标分离与图像融合算法在多类型损伤定位中的应用
基于导波的结构健康监测方法对小损伤敏感,能够实现大面积监测,具有实际应用潜力。在这些方法中,使用压电换能器(PZT)传感器阵列的概率检测重建算法(RAPID)是执行主动损伤监测和定位的最广泛使用的成像算法之一。然而,由于传感路径以不均匀的密度分布在传感器阵列内部,RAPID算法只能在阵列内部发生损伤时定位损伤。如果损伤发生在阵列外部或阵列内外,即多类型损伤,RAPID算法的性能将不令人满意。本文提出了一种基于散射系数的RAPID损伤指标分离与图像融合算法。在概率分布函数中,采用相应战斗时间的损伤散射信号幅度作为权重,然后在RAPID算法中将损伤指标分为两类,分别进行内外损伤定位。最后,在具有中心大孔和周边螺栓孔的复合材料板上进行了实验,验证了该方法。实验结果表明,该方法可以实现多类型损伤定位,误差小于40 毫米。
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来源期刊
CiteScore
12.80
自引率
12.10%
发文量
181
审稿时长
4.8 months
期刊介绍: Structural Health Monitoring is an international peer reviewed journal that publishes the highest quality original research that contain theoretical, analytical, and experimental investigations that advance the body of knowledge and its application in the discipline of structural health monitoring.
期刊最新文献
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