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• W2996161844 abstract "This paper presents an ultrasonic Lamb wave imaging method based on time-domain topological energy to address artifacts in the results of traditional ultrasound imaging methods. This method is based on topological theory and the calculation of the direct and adjoint sound fields in a defect-free reference medium. It focuses the direct and adjoint sound fields at the cavity defect using time reversal and their time-domain topological energy as the pixel values of the image to reduce the artifacts. The physical mechanism of time-domain topological energy (TDTE) imaging is revealed by finite element simulation and experiment. The feasibility of this method for multilayer concrete cavity defect imaging is verified. Compared with the traditional synthetic aperture focusing technique (SAFT) imaging method, the numerical simulation and experimental results show that the method can overcome the influence of ultrasonic Lamb wave dispersion and locate cavity defects with high accuracy and few artifacts. These features indicate the potential of the method in imaging damage concrete structures." @default.
• W2996161844 created "2019-12-26" @default.
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• W2996161844 date "2019-12-20" @default.
• W2996161844 modified "2023-10-18" @default.
• W2996161844 title "Time-Domain Topological Energy Imaging Method of Concrete Cavity Defect by Lamb Wave" @default.
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• W2996161844 doi "https://doi.org/10.1155/2019/6294603" @default.
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