Modeling guided wave propagation with application to the long-range defect detection in railroad tracks

Bartoli, Ivan; Scalea, Francesco Lanza di; Fateh, Mahmood; Viola, Erasmo

doi:10.1016/j.ndteint.2004.10.008

Cited by 151 publications

(93 citation statements)

References 12 publications

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“…In short, the low-frequency section and less-mode ultrasound are appropriate for the detection requirements of long-distance ultrasonic guided wave inspection. For example, a similar low-frequency ultrasonic guided wave equivalent simulation was applied to rails (a rod-like structure) by Bartoli et al [7].…”

Section: The Mode Selection Of Ultrasonic Guided Wavementioning

confidence: 99%

“…Moreover, the reflected pulse wave was used to locate the flaws. For example, the flaws in a steel rail flange were detected in reference [7] and the orientation and position of small flaws in pipes were detected in reference [8]. In previous studies, researchers have provided considerable advances in long-distance non-destructive testing (NDT).…”

Section: Introductionmentioning

confidence: 99%

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The Study of Non-Detection Zones in Conventional Long-Distance Ultrasonic Guided Wave Inspection on Square Steel Bars

et al. 2018

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Abstract:In a low-frequency ultrasonic guided wave dual-probe flaw inspection of a square steel bar with a finite length boundary, the flaw reflected pulse wave cannot be identified using conventional time monitoring when the flaw is located near the reflection terminal; therefore, the conventional ultrasonic echo method is not applicable and results in a non-detection zone. Using analysis and simulations of ultrasonic guided waves for the inspection of a square steel bar, the reasons for the appearance of the non-detection zone and its characteristics were analyzed and the range of the non-detection zone was estimated. Subsequently, by extending the range of the conventional detection time domain, the envelope of the specific reflected pulse signal was extracted by a combination of simulations and related envelope calculations to solve the problem of the non-detection zone in conventional inspection methods. A comparison between the simulation and the experimental results demonstrate that the solution is feasible. This study has certain practical significance for ultrasonic guided wave structural monitoring.

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Section: The Mode Selection Of Ultrasonic Guided Wavementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Study of Non-Detection Zones in Conventional Long-Distance Ultrasonic Guided Wave Inspection on Square Steel Bars

et al. 2018

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“…50 is adopted as the element number in the y direction for the simulation. l ex must also be small enough to ensure that there exists a sufficient number of elements in one wave length of the Lamb waves, which means that if k = lm/B is the wave length and then N should be at least 10 for a good spatial resolution, and the value of 20 is recommended [24]. Unlike the normal situation where a narrowband tone burst signal is used to generate an almost pure wave mode, in this work a broadband triangle impulse of displacement boundary conditions (Fig.…”

Section: Broadband Simulation Of Lamb Wavesmentioning

confidence: 99%

Mode identification of broadband Lamb wave signal with squeezed wavelet transform

et al. 2017

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. It's proved that as an alternative tool, the squeezed wavelet transform could be used for the analysis of a broadband Lamb wave signal. An additional benefit of this transform is that it permits reconstruction of the original signal or its components, which is not possible for the reassigned scalogram.

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“…They use the splitting of P-waves and S-waves for more understandable imaging of calculated velocity fields. In the article [31] authors obtain the reflection form transverse defect in the rail top. Also they discussed the dependence from its size and orientation.…”

Section: Non-destructive Testing Of Railwaymentioning

confidence: 99%

Grid-Characteristic Method for Numerical Modeling of Wave Processes in Three-Dimensional Problems of Dynamic Loading of Complex Structures

Petrov¹,

Favorskaya²,

Хохлов³

et al. 2015

RENSIT

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Modeling guided wave propagation with application to the long-range defect detection in railroad tracks

Cited by 151 publications

References 12 publications

The Study of Non-Detection Zones in Conventional Long-Distance Ultrasonic Guided Wave Inspection on Square Steel Bars

The Study of Non-Detection Zones in Conventional Long-Distance Ultrasonic Guided Wave Inspection on Square Steel Bars

Mode identification of broadband Lamb wave signal with squeezed wavelet transform

Grid-Characteristic Method for Numerical Modeling of Wave Processes in Three-Dimensional Problems of Dynamic Loading of Complex Structures

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