自由縁に衝撃荷重を受ける平板の弾性波動

概要

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Elastic waves in a plate subjected to impact loads on its free edge, especially the Rayleigh surface waves, are investegated experimentally and theoretically. Time histories of elastic strain waves in a steel plate, gener-ated by impacts with steel balls and uniform steel bars, are measured on the surface and free edge of the plate. The experimental observation showed that no dispersion of surface waves propagating along the edge of the plate occured while body waves along thc surface were rapidly attenuated with the distance of propagation. Theoretical calculations are carried out for the case of an impulsive. distributed load applied on the free edge of a plate. The theoretical prediction also showed that dominant waves propagating along the free edge of a plate were the Rayleigh surface waves. Theoretical predictions almost agreed with the experimental results.