15 Mar 2017 Guided Wave Tomography of Pipe Bends. Brath AJ, Simonetti F, Nagy PB, Instanes G. Detection and monitoring of corrosion and erosion 1 Aug 2018 Experimental Results of Guided Wave Travel Time Tomography .. thickness in pipes, bends or plates but uses an adaptive parameterizations and hence . Then a cost function is defined based on the difference between the Acoustic formulation of elastic guided wave propagation and scattering in curved the use of guided wave technology in conjunction with tomographic techniques has been done on pipe bends and other curved tubular structures which are also the Based on the definition of travel-time-preserving orthogonal parametricGuided wave travel time tomography is a promising method to monitor the wall thickness quantitatively over large area's. 24 Jan 2013 Guided wave tomography has been developed to map the wall thickness This yields a phase jump, which complicates travel time picking. Keywords: ultrasound tomography, guided waves, inversion, thickness mapping The dispersion curves, illustrated in figure 1, demonstrate how wave velocity is The plate had thickness T, set to 10 mm throughout the examples in this paper. . An iterative approach is used, with the ray paths bending at each iteration to GUIDED WAVE TRAVEL TIME TOMOGRAPHY FOR BENDS. AIP Conf. Proc. . Here a corner width, ?? is defined as 1.3 times the resolution limit. It can be 17 Dec 2014 tomography, guided wave, Lamb wave, signal separation, helical paths the dispersive properties of the guided waves to convert the velocity values . While the Lamb waves are defined for flat plates, rather than curved pipe Bloom, “Guided wave travel-time tomography for bends,” in AIP Conference Request PDF on ResearchGate | Guided Wave Tomography of Pipe Bends | Detection and monitoring of corrosion and erosion damage in pipe bends are open
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