減退記憶理論による粘弾性体中の波動減衰

概要

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Viscosity of material is often explained with the use of "dashpot" in earthquake engineering nowadays. It follows that the attenuation of wave propagation in such material must be an exponential function. This limits us to search the real characteristic of earthquake wave propagation because the real attenuation can not only be an exponential function naturally. To realize the nature of earthquake wave, the fading memory theory is introduced in this paper. The attenuation property Q and theoretical solution of wave propagation in material with fading memory are presented. Some examples are calculated. The memory functions of dashpot system and creep function are also shown. The final result can be noted as: not like that in material of dashpot system, to find the dynamic behavior of real ground becomes possible if memory function is justified pertinently.
1990-11-30