現場計測(1)

[III-431] SIMPLIFIED INVERSION IN SURFACE WAVE METHOD BY FINITE ELEMENT MODELING

〇Shin-ichi Nishimura¹, YUXIANG Ren¹, Toshifumi Shibata¹ (1.Okayama- University)

Keywords:Surface wave method, Dynamic finite element method, Inverse analysis, Young's Modulus

As a kind of non-destructive seismic method, Surface-wave methods could be performed on surveying stiffness of near-surface. Procedures of the methods are data acquisition, processing and inversion. Spectral analysis are used for inversion in conventional methods. This research propose a new simplified method for inversion by comparing first arrival between finite element modeling and in-situ investigation. Parameters of finite element model are regarded as solution of inversion,when the error of those become minimum.Golden section search were used to search the minimum error.