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S. Teidj^{1^{, A. Khamlichi¹, A. Driouach¹ and E. Jacquelin²¹Systems of Communications and Detection Laboratory, Faculty of Sciences, Tetouan, Morocco

²IFSTTAR, LBMC, UMR_T9406, University of Lyon, Bron, Villeurbanne, France}}

Keywords: guided waves, wavelets, spectral finite element method, rails, flaws, laser spot excitation, laser torsional vibrometer.

Abstract

In this work, detection of damage in rails was investigated by using a technique based on propagation of non dispersive elastic torsional waves in the rail structure. Modelling was performed by means of the spectral finite element method. The proposed damage detection procedure consisted of a sequence of three steps. The first step was the calculation of wave propagation in the rail structure in the presence of a localized defect which was assumed to result from partial loss of the sectional torsional rigidity. The response in terms of the rate of transverse section rotation was then obtained for a given rail point location. The final step consisted in operating the Mexican hat wavelet transform on the fault signal. Detectability of transverse defects of this type was assessed by direct analysis of the obtained diagram in the time-frequency domain.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	International Journal of Railway Technology ISSN 2049-5358 IJRT, Volume 3, Issue 3, 2014 Detection of Transverse Type-Defects in Rails using Ultrasonic Guided Waves S. Teidj^{1^{, A. Khamlichi¹, A. Driouach¹ and E. Jacquelin²¹Systems of Communications and Detection Laboratory, Faculty of Sciences, Tetouan, Morocco ²IFSTTAR, LBMC, UMR_T9406, University of Lyon, Bron, Villeurbanne, France}} doi:10.4203/ijrt.3.3.2 purchase the full-text of this paper Full Bibliographic Reference for this paper S. Teidj, A. Khamlichi, A. Driouach, E. Jacquelin, "Detection of Transverse Type-Defects in Rails using Ultrasonic Guided Waves", International Journal of Railway Technology, 3(3), 17-40, 2014. doi:10.4203/ijrt.3.3.2 Keywords: guided waves, wavelets, spectral finite element method, rails, flaws, laser spot excitation, laser torsional vibrometer. Abstract In this work, detection of damage in rails was investigated by using a technique based on propagation of non dispersive elastic torsional waves in the rail structure. Modelling was performed by means of the spectral finite element method. The proposed damage detection procedure consisted of a sequence of three steps. The first step was the calculation of wave propagation in the rail structure in the presence of a localized defect which was assumed to result from partial loss of the sectional torsional rigidity. The response in terms of the rate of transverse section rotation was then obtained for a given rail point location. The final step consisted in operating the Mexican hat wavelet transform on the fault signal. Detectability of transverse defects of this type was assessed by direct analysis of the obtained diagram in the time-frequency domain. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to IJRT purchase this issue (price £70 +P&P)
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