Decreasing the influence of dispersive wave modes in long-range ultrasonic rail testing using wavelets

Kappatos, Vassilios; Selcuk, Cem; Gan, Tat-Hean; Gharaibeh, Y.

doi:10.1049/cp.2011.0617

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…(a) laser vibrometer, 74 (b) four transducer array on operational rail track (two transducers hidden on opposite side of rail head), 76 (c) an array of transducers mounted under a rail foot, 77 (d) piezoelectric elements around rail circumference. 78 …”

Section: Defect Detectionmentioning

confidence: 99%

“…The selection of modes that are confined in the foot was carried out by following the development carried out in the frame of the Monitorail project. 81 Actually, a suitable excitation, which is based on piezoelectric elements around rail circumference (Figure 9(d)), has been developed in the said project 78,82–84 in order to examine different portions of the rail cross-section, including the foot.…”

Section: Defect Detectionmentioning

confidence: 99%

“…The developed method has demonstrated a good potential to detect the thermite welds used to join old and new rail. The dispersion effect in rail structure was also investigated by Kappatos et al ., 78 using a method based on the discrete wavelet transform (DWT). Hesse and Cawley 85 have examined a surface waves in rails to determine a nondispersive modes at low frequency range with a high penetration depth in rails.…”

Section: Defect Detectionmentioning

confidence: 99%

“…The selection of modes that are confined in the foot was carried out by following the development 74 (b) four transducer array on operational rail track (two transducers hidden on opposite side of rail head), 76 (c) an array of transducers mounted under a rail foot, 77 (d) piezoelectric elements around rail circumference. 78 carried out in the frame of the Monitorail project. 81 Actually, a suitable excitation, which is based on piezoelectric elements around rail circumference (Figure 9(d)), has been developed in the said project 78,[82][83][84] in order to examine different portions of the rail cross-section, including the foot.…”

Section: Understanding and Optimization Studiesmentioning

confidence: 99%

“…78 carried out in the frame of the Monitorail project. 81 Actually, a suitable excitation, which is based on piezoelectric elements around rail circumference (Figure 9(d)), has been developed in the said project 78,[82][83][84] in order to examine different portions of the rail cross-section, including the foot. Some other algorithmic developments were carried out in order to reduce (said also compensate) the dispersion.…”

Section: Understanding and Optimization Studiesmentioning

confidence: 99%

See 4 more Smart Citations

On the use of ultrasonic guided waves for the health monitoring of rails

Masmoudi

Yaacoubi

Koabaz

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper deals with the health monitoring of rails. Many nondestructive techniques have been applied to rule on the health of rails. Ultrasonic guided waves (UGWs) technique is one among them. The current study focuses on this technique. First, it describes several kinds of defects that can occur in rails. Then, it presents the principle, advantages and limitations of UGW technique. The paper gathers as exhaustive as possible the previous works in which the said technique was used as a tool to monitor the health of rails. The paper put special emphasis on the use of UGW in structural health monitoring (SHM) context. In order to better understand the benefit/need of this technique in this context, by especially the non-specialist reader, a background concerning SHM is provided.

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