KRYLOV, V.V., 1991. On the existence of a symmetric acoustic mode in a quadratic solid wedge. Moscow University Physics Bulletin, 46 (1), pp. 45 - 49
It is shown that in a solid truncated wedge whose local thickness depends
quadratically on its height, along with the earlier predicted countable set of
antisymmetric acoustic modes localized near the apex, there can also exist a
single symmetric acoustic mode. This mode is localizsd in the vicinity of the
wedge apex: and its characteristics are close to those of Rayleigh's surface acoustic
mode. The phase velocity and the field structure of tbe mode are calculated.
The lowest-frequency boundary for the region of its existence is determined.
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