Probability of detection of cracks in metal structures using guided wave based on a signal response analysis model

被引：0
作者：
Wang L. [1 ,2 ]
Yang Y. [2 ]
Liu G. [2 ]
Wang X. [2 ]
Li J. [2 ]
Ren Y. [2 ]
机构：
[1] State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] National Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute of China, Xi'an
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 02期
关键词：
fatigue crack; guided wave; metal; probability of detection (POD); structural health monitoring;
D O I：
10.13465/j.cnki.jvs.2024.02.004
中图分类号：
学科分类号：
摘要：
In order to realize the condition-based maintenance and formulate the inspection and maintenance scheme during the service, the probability of detection (POD) for guided wave damage monitoring technology must be clarified, as a new nondestructive testing method. A novel POD computation method was presented for guided wave detection based on a signal response analysis model. First, the statistical computation model of POD was obtained by establishing the mapping relationship between the damage features of online response guided waves and fatigue cracks. Then, by analyzing the quantitative effect of uncertainties of fitting parameters on the statistical computation model, POD computation models under different confident levels were obtained. The proposed method was validated by fatigue cracks monitoring experiments on metal center-hole and lap specimens. The results show that damage features, fitting functions and transducers monitoring schemes all have effects on the POD, and the detectable crack length under 95% confidence level and 90% detection probability for center-hole and lap metal structures are about 2. 6 mm and 9. 5 mm respectively. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：32 / 41and186
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