傾斜不均質介在層に対する弾性波の反射エネルギー計算 : 線形不均質要素層による積層近似法

概要

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Stacking of linear inhomogeneous layer elements approximates well a gradient inhomogeneous layer, and makes calculations easy. Each of the elements varies in thickness depending on the acoustic impedance. A formulation which makes use of the transfer matrix method reduces the number of calculations required. The variation of acoustic impedance within the layer is an important parameter for the characterization of the inhomogeneous structure of the material. To characterize the structure with a small number of calculations, the stacking method is developed and applied to the calculation. The most effective method of numerical estimation for a solid with monotonic variation of impedance, typical of the gradient functional materials, is investigated while changing the thickness of the stacked elements. The numerical example for an actual functionally gradient material, SiC-TiC layer, is shown with the gradient parameter p and adjustment parameter k.
一般社団法人日本機械学会の論文
1994-07-25