Detection of defect in ballastless track based on impact echo method combined with improved SAFT algorithm

Engineering Structures（2022）

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摘要

•Simulation of elastic wave propagation in ballastless track.•Improved SAFT algorithm for imaging defect based on impact echo method.•Factors influencing the identification of defect.•Experimental validation of the effectiveness of impact echo method combined with improved SAFT algorithm.

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关键词

Ballastless track,Defect,Impact echo method,Synthetic aperture focusing technique,Reconstructed image

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