異方性材料界面における弾性波の反射と透過

概要

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Coefficients of reflection and transmission of elastic waves to a non-symmetric boundarysurface of anisotropy are obtained. The analysis shows mainly on a characteristic slowness surface. A normal vector on the slowness surface indicates power flow direction of characteristic waves. This is the important clue to construct the formal solutions by the selection of propercharacteristic waves. The selection is made by power flow direction of the waves. The formal solutions should compensate the continuity conditions at the interface disturbed by incident waves. For a general anisotropic composite material, the analysis is apt to complex. Therefore, the application of slowness surface to the selection is very influential to avoid confusion in the analysis. Numerical examples are presented for the surface coupled with water. Those results show us the effect of deviation angle of the principal axis from the boundary normal on the coefficients of reflection and transmission power.
秋田大学鉱山学部の論文