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Дата последнего поиска статьи во внешних источниках: 19 января 2025 г.
Аннотация:Anomalous guided waves appearing at a non-semisimple degeneracy of the fundamentalmatrix are observed and analyzed in the framework of the Cauchy sextic formalism. The non-semisimple degeneracy condition is explicitly constructed for the most general case of Lamb waves propagating in a traction-free layer with arbitrary elastic anisotropy. A new type of dispersion equation andthe corresponding dispersion solution are obtained. The connection with surface waves of the nonRayleigh type is discussed.