Damage detection in multi-wire cables using guided ultrasonic waves
Damage detection in multi-wire cables using guided ultrasonic waves
复制标题
DOI：
10.1177/1475921716642747
复制
发表时间：
2016-05-01
影响因子：
6.6
通讯作者：
Gaul, Lothar
中科院分区：
文献类型：
--
作者：
Schaal, Christoph;Bischoff, Stefan;Gaul, Lothar
结构健康监测系统的开发是为了经济有效地防止机械和土木结构的故障，并预测结构的剩余寿命。在这项工作中，损伤检测算法的基础上的希尔伯特变换的记录信号从诱导的超声波。利用该算法，通过对波包的飞行时间分析，对多丝电缆进行了损伤定位。该算法是完全自动化的，并独立地区分来自不同波的波包。它的适用性进行了分析，实验室实验上的一个单一的圆柱形电线和多线电缆。作为一个额外的损伤指标，二次谐波进行评估。分析了通过评估波幅值进行损伤识别的可能性。的振幅进行了比较与参考数据从一种新的混合有限元边界元法。
Structural Health Monitoring systems are developed to cost-efficiently prevent failure of mechanical and civil structures, and to predict the structure's residual life. In this work, a damage detection algorithm based on the Hilbert transform of the recorded signals from induced guided ultrasonic waves is presented. By means of this algorithm, damage localization in multi-wire cables is performed through a time-of-flight analysis of the wave packets. The algorithm is fully automated and distinguishes between wave packets from different waves independently. Its applicability is analyzed for laboratory experiments on a single cylindrical wire and on multi-wire cables. As an additional damage indicator, second harmonic waves are evaluated. Furthermore, the possibility to perform damage identification by evaluating the waves' amplitudes is analyzed. The amplitudes are compared with reference data from a novel hybrid finite-boundary element method.