スペクトル解析による含液多孔質体Biotモデルの同定 : その方法の提案

概要

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The method and procedures are proposed for full experimental identification of the Biot model of fluid-saturated porous elastic media by spectrum analysis. The frequency response function is derived for incident and transmitted ultrasonic waves through an inclined porous elastic layer immersed in fluid. It is shown that amplitude ratios of three terms in that function and three travel time differences of the first and second compressional waves and the shear wave from the sound wave in the fluid can be determined by curve fitting in the Bode and/or Nyquist diagram and that the data obtained from the curve fitting and the five equations derived enable full identification of-the Biot model, that is, estimation of four independent elastic moduli and a dynamic tortuosity. The proposed method can be applied to the case of negligible fluid viscosity.
一般社団法人日本機械学会の論文
1992-08-25