Inversion of the elastic parameters of a layered medium
Journal
Journal of the Acoustical Society of America
Journal Volume
97
Journal Issue
3
Pages
1687-1693
Date Issued
1995
Author(s)
Abstract
This paper presents a method for constructing the elastic parameters of a layered elastic medium such as the wave velocities, densities, and thicknesses of the layers. The inverse problem is formulated as an optimization problem in which the norm of the discrepancies between the measured and calculated surface response is minimized. The experiments were conducted on a thin plate. The impact of a steel ball was adopted to generate a vertical point source, and an NBS conical transducer was used to record the surface response. The received signals were then processed by the layer-stripping technique to reconstruct the layer properties and thickness from the top layer down. The recovered parameters agree well with the true parameters of the specimen.
SDGs
Type
journal article