音響流体充てん二円孔の介在による後方散乱弾性波のスペクトル解析

概要

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The formulation is the so-called "orders of scattering" approach with the translation of wavefunctions expressed in one local coordinate system to those of another. The scattered waves for incident plane harmonic pressure waves are expressed as an infinite sum of various orders of scattering. An exact steadystate solution is derived for the scattered radial stress, which is also the power spectra of scattered pulses due to the impulse incident. Further, the solution is simplified for the case of far field backscattering. The power spectrum, ranging from 0-6MHz, is calculated for various geometrical parameters of the problem. Spectral features are explained with 3-D graphic representations. In concluding remarks deduced from the graphics, the increase of center to center separation of two cavities makes the periodicity of scattering intensity distribution short. Abrupt diminishes of intensity are caused at resonant frequencies of the cylindrical cavities containing acoustic fluid.
一般社団法人日本機械学会の論文
1986-01-25