切欠のある棒における分散性波動の変形　第２報　周波数分布および逆散乱過程

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  • Distortion of dispersive waves in partially notched rods. 2nd report. Frequency distribution and inverse scattering.
  • キリカキ ノ アル ボウ ニ オケル ブンサンセイ ハドウ ノ ヘンケイ 2

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Modulation of elastic waves plays an important role in the analyses of dynamic behaviour and fracture of mechanical structures. The present article, following the preceding report, deals with scattering of dispersive waves by a notch on a rod by which geometrical inhomogeneity is introduced. The incident waves and the scattered waves caused by the notch are distorted with time during their propagation along the rod owing to dispersion. Unsteady frequency distribution is analysed by use of the FFT method to elucidate the wave interaction. Moreover, our interests are devoted to the simplified inverse scattering process in estimating the waveform of the incident waves and dimension of the notch from the information included in the scattered waves.

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