減退記憶理論に基づく粘弾性波動の減衰特性に関する基礎的研究

概要

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Viscosity of ground is now being often explained with the use of "dashpot". This limits us to understand the earthquake wave because the attenuation is unreasonable to be ranged only in "dashpot" naturally, especially the dependence on frequency of Quality factor can not be explained. To realize the natural attenuation of earthquake wave, the ground is assumed to be a linear material with fading memory in this paper. The Quality factor is derived to be dependent on memory function, which implies that if the memory function is justified pertinently the real Quality factor can be understood. Theoretical solution of wave propagation is also shown. The memory functions for material of "dashpot" are also presented. On the contrary, if the Quality factor was investigated, the memory function also can be calculated with the use of the linearly second kind of Fredholm integral equation. Some examples are presented.
一般社団法人日本建築学会の論文
1991-03-15