垂直方向に振動している円形剛板より放射される定常振動

概要

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This paper presents the experimental results on the stationary vibration radiated from the circular plate. First, the approximate expressions for transfer function between the vibration source and surface wave are introduced. These expressions are compared with the experimental results, and it is showed that these expressions are applicable for the range over 2.5 wavelength away from the source, and the dimensionless frequency less than 2. Next, the experimental method and the test results are presented. The experiments are conducted using the half-space model made of the silicone rubber which has internal dissipation. The measured compliance under the plate coincides with the Bycroft's theoretical solution for dimensionless frequency less than 2. The characteristics of the amplitude reduction with distance of radiated wave are largely affected by the dimensionless frequency. For small value of the dimensionless frequency, the amplitude reduction with distance of the wave shows nearly equal to the one of the body wave inside 0.3 wavelength from the source, and also to the one of the Rayleigh wave over the range 2.5 wavelength away from the source.
社団法人日本音響学会の論文
1983-10-01