Linearized inverse scattering for elastic parameters in a half-space with reflection data |
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Authors: | Zhu Wen-hao Associate Professor Dai Hui Zhong Wei-fang |
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Institution: | (1) Department of Mechanics, Huazhong University of Science and Technology, 430074 Wuhan, P R China |
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Abstract: | The multi-parameter inversion of elastic wave equation in a half-space within the Born approximation is studied. A method
of simultaneously reconstructing the configurations of the density and Lamé parameters of the medium was presented by use
of a wideband measuring schemes in which transmitters and receivers scan over the half-space surface. It is shown that the
reflected waves generated by horizontal and vertical pulses on the surface can be decomposed into P→P, P→S, S→P and S→S types
of scattering components. As is expected, these components contain enough information for desired restruction. From them the
density and two Lamé parameters are determined explicitly, and the results obtained have the form of filtered back-propagation
as in the acoustic diffraction tomography.
Foundation item: the Doctoral Program Foundation of Higher Educations (98048705)
Biography: Zhu Wen-hao (1959∼) |
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Keywords: | inverse scattering SRP Born approximation filtered back_propagation |
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