Spectrum Analysis of Surface Wave Method Based on Multi-Mode Separation
ZHANG Da-zhou
GU Han-ming
XIONG Zhang-qiang
XIAO Jin-hong
Abstract：Spectrum analysis of surface wave (SASW) is one of the Rayleigh wave exploration methods with higher lateral resolutioa Presently, there is a large error in calculating fundamental mode dispersion curve of the Rayleigh wave and the dispersion curve of the higher mode can't be calculated by the SASW method. As a result, it is limited in its application. In this paper, different modes of Rayleigh wave are separated and extracted by Fourier transform (FT method), and then, the dispersion curve will be calculated by the SASW method using the Rayleigh wave data after the separation. According to the analysis of examples, it can be concluded that; (1) when using the SASW method to calculate the fundamental mode dispersion curve, the Rayleigh wave data of fundamental mode should be separated first, and then calculated. Or else, the fundamental mode dispersion curve couldn't be right; (2) it can get higher mode dispersion curve by the SASW method based on multi-mode separation.
Keywords：Rayleigh waveFourier transformSASW methodhigher modeseismic prospecting.
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1012-1018 )