Extract the Dispersion Curves through the S Transform Based on the F-K Separation

摘要

In order to improve the inversion precision interpreted with the instantaneous Rayleigh wave method,the multi-mode Rayleigh wave signals stacked in the time domain are decomposed in the frequency-wave number domain with F-K separation method and then multi-mode dispersion curves of Rayleigh of two-trace data are calculated with S transform so as to avoid the error caused by the mutual interference of each mode.It can be known through the theoretical model analysis that the precision of the dispersion curves from the surface wave data after F-K separation and then S transform is obviously higher than the one of the dispersion curves obtained before separation and the high model dispersion curves of two-trace data can be calculated.