切欠きを通過する表面波の挙動

概要

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In order to investigate the behaviour of Rayleigh surface wave passing through a slit notch, a surface wave generated by collision of a steel ball and traveled on the edge of a steel plate was observed. If h/λ, which is the ratio of the wave length of Rayleigh wave to the length of the notches, is smaller than 0.2, the amplitude of Rayleigh wave after the notch was more than 60% of that before the notch. And if h/λ>0.6, the amplitude of the wave after the notch was less than 20%. A numerical analysis due to a finite differential method (FDM) was also performed. The results of the analysis agree well with the experimental results. It was also found from the FDM results that Rayleigh wave does not propagate along the surface of the notch maintaining it's original shape, but passes through the notch inducing new waves at the tip of the notch and/or at a point of the plate edge after the notch.
社団法人日本材料学会の論文
1994-04-15