The Principle of Detection and Location of a Target in Layered Media Containing Solids by Snapshot TR-RTM Mixed Method

Layered structures are widely used, and their safety in service will be severely affected by the existence of defects. The snapshot time reversal and reverse time migration mixed method with longitudinal wave is adopted to detect and locate the target or defect in layered media containing solids. A mountain-like acoustic field distribution is constructed through the numerical simulations, and the location of the summit is that of the target, which realizes the detection and location of the target in layered media containing solids. In addition, this method can obtain a better signal-to-interference ratio by suppressing the interference of the interface reflection.