Wave equation dispersion inversion using a difference approximation to the dispersion-curve misfit gradient
作者： Zhen-dong Zhang , Gerard Schuster , Yike Liu , Sherif M. Hanafy , Jing Li
DOI: 10.1016/J.JAPPGEO.2016.07.019
关键词: Stokes wave 、 Wave packet 、 Wave propagation 、 Classical mechanics 、 Phase velocity 、 Dispersion relation 、 Group velocity 、 Plane wave 、 Mathematical analysis 、 Surface wave 、 Mathematics
摘要: Abstract We present a surface-wave inversion method that inverts for the S-wave velocity from Rayleigh wave dispersion curve using difference approximation to gradient of misfit function. call this equation skeletonized surface waves because fundamental-mode is inverted finite-difference solutions multi-dimensional elastic equation. The best match between predicted and observed curves provides optimal model. Our can invert lateral variations also mitigate local minimum problem in full waveform with reasonable computation cost simple models. Results synthetic field data illustrate benefits limitations method.
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