An improved equivalent homogenous half_space method and reverse fitting analysis of Rayleigh wave dispersion curve
改进的等效半空间法及瑞雷波频散曲线反演

Theoretical analysis shows that there are several values of the phase velocity to a certain frequency of the Rayleigh wave on the surface of a layered medium, which is called the multiple rank property of Rayleigh wave. The multiple rank property of the surface wave results in the complication of measured dispersion curves, especially when a soft interlayer exists in the strata. This brings difficulties to the explanation of the dispersion curves measured on this kind of sites. In order to facilitate engineering applications, a new method, improved equivalent homogenous half-space method, is medium based on the equivalent homogenous multiple value problem of the phase velocity, to compute the theoretical dispersion curve of a layered half-space theory. This new method does not need to deal with the and the phase velocity resulting from this method can reflect the synthetic effect of all ranks of Rayleigh waves. The inverse fitting program is compiled based on the improved equivalent homogenous half-space method, which has gotten a very good effect in an engineering application.