Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform

Yu, Long; Li, Zheng; Gong, Kezhuang

doi:10.1016/j.ymssp.2012.01.020

Cited by 25 publications

(6 citation statements)

References 20 publications

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“…The applications of guided waves were described in non-cylindrical structures [29]- [33], such as railway rails and structural 'I' beams. Liu et al [34] proposed a method to detect radial cracks in annular structures and its methodology built on guided circumferential waves and continuous wavelet transform. Sanderson et al [35] adopted finite element analysis and experiments to explain the received signal changes caused by the pipe bending.…”

Section: Introductionmentioning

confidence: 99%

A Rapid and Accurate Technique With Updating Strategy for Surface Defect Inspection of Pipelines

Wang

Liu

et al. 2021

IEEE Access

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Defect inspection in pipes at the early stage is of crucial importance to maintain the ongoing safety and suitability of the equipment before it presents an unacceptable risk. Due to the nature of detection methods being costly or complex, the efficiency and accuracy of results obtained hardly meet the requirements from industries. To explore a rapid and accurate technique for surface defects detection, a novel approach QDFT (Quantitative Detection of Fourier Transform) has been recently proposed by authors to efficiently reconstruct defects. However, the accuracy of this approach needs to be further improved. In this paper, a modified QDFT method with integration of an integral coefficient updating strategy, called QDFTU (quantitative detection of Fourier transform of updating), is developed to reconstruct the defect profile with a high level of accuracy throughout iterative calculations of integral coefficients from the reference model updated by a termination criteria (RMSE, root mean square error). Moreover, dispersion equations of circumferential guided waves in pipes are derived in the helical coordinate to accommodate the stress and displacement calculations in the scattered field using hybrid FEM. To demonstrate the superiority of the developed QDFTU in terms of accuracy and efficiency, four types of defect profiles, i.e., a rectangular flaw, a multi-step flaw, a double-rectangular flaw, and a triple-rectangular flaw, are examined. Results show the fast convergence of QDFTU can be identified by no more than three updates for each case and its high accuracy is observed by a smallest difference between the predicted defect profile and the real one in terms of mean absolute percentage error (MSPE) value, which is 6.69% in the rectangular-flaw detection example. INDEX TERMSCircumferential guided wave, Hybrid FEM, reconstruction, reference model, updating strategy. YIHUI DA received the B.S. degree in theoretical and applied mechanics from Henan Polytechnic University, Henan, China, in 2009, and the M.S. degree in general and fundamental mechanics and the Ph.D. degree in engineering mechanics from the Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 2014 and 2018, respectively.Since 2019, he has been working as a Postdoctoral Researcher with the Nanjing University of Aeronautics and Astronautics. His research interests include the numerical modeling of ultrasonic guided waves, ultrasonic nondestructive evaluation, and signal processing.

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Section: Introductionmentioning

confidence: 99%

A Rapid and Accurate Technique With Updating Strategy for Surface Defect Inspection of Pipelines

Wang

Liu

et al. 2021

IEEE Access

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“…However, they can be better distinguished through time-frequency representations [30][31][32][33] such as the short-time Fourier transform (STFT). Time-frequency analysis was applied to ultrasonic guided waves before, to increase the detectability of defects in plates [34,35] and pipes [36,37].…”

Section: Introductionmentioning

confidence: 99%

Strain Sensitivity Enhancement of Broadband Ultrasonic Signals in Plates Using Spectral Phase Filtering

et al. 2021

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The focused signal obtained by the time-reversal or the cross-correlation techniques of ultrasonic guided waves in plates changes when the medium is subject to strain, which can be used to monitor the medium strain level. In this paper, the sensitivity to strain of cross-correlated signals is enhanced by a post-processing filtering procedure aiming to preserve only strain-sensitive spectrum components. Two different strategies were adopted, based on the phase of either the Fourier transform or the short-time Fourier transform. Both use prior knowledge of the system impulse response at some strain level. The technique was evaluated in an aluminum plate, effectively providing up to twice higher sensitivity to strain. The sensitivity increase depends on a phase threshold parameter used in the filtering process. Its performance was assessed based on the sensitivity gain, the loss of energy concentration capability, and the value of the foreknown strain. Signals synthesized with the time–frequency representation, through the short-time Fourier transform, provided a better tradeoff between sensitivity gain and loss of energy concentration.

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“…Continuous WT (CWT) and discrete WT (DWT) are usually used for time-waveform signal processing in the analysis of guided waves. CWT has been used as a time-frequency analysis tool to separate and extract proper frequency components of guided waves that are highly dispersive and with multimodes [32][33][34][35]. DWT, on the other hand, has been frequently used for the denoising, compression and decomposition of guided waves [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Wavelet-aided guided wavefield imaging of delaminations in laminated composite plates

Sha

Radzieński

et al. 2020

Smart Mater. Struct.

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Delamination is a commonly encountered type of damage in composite structures, which may lead to degraded performance and even failure of structures. Thus, detection of delaminations is considered a vital task to maintain structural integrity and reliability. This paper presents a delamination imaging method based on the analysis of guided wavefields. The method relies on the fact that delaminations in a structure will cause wavefield anomalies, which in turn can be utilized for the indication of delamination zones. Such anomalies, however, could be easily masked by the major components of the wavefield signals including incident waves from actuators and reflected waves from structural boundaries. To address the problem, one-dimensional wavelet transform (WT) is used to process the wavefields leading to WT wavefields. The WT wavefields can highlight signal anomalies associated with delaminations. A WT wavefield imaging algorithm is first constructed step by step in detecting multiple delaminations in a glass fiber reinforced polymer (GFRP) plate. The algorithm is then successfully used in the imaging of a single delamination zone in a carbon fiber reinforced polymer (CFRP) plate. The locations, sizes, and shapes of the delamination zones in the GFRP and CFRP plates are clearly visualized in the ultimate damage maps.

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Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform

Cited by 25 publications

References 20 publications

A Rapid and Accurate Technique With Updating Strategy for Surface Defect Inspection of Pipelines

A Rapid and Accurate Technique With Updating Strategy for Surface Defect Inspection of Pipelines

Strain Sensitivity Enhancement of Broadband Ultrasonic Signals in Plates Using Spectral Phase Filtering

Wavelet-aided guided wavefield imaging of delaminations in laminated composite plates

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