Further Remarks on Extra Roots of Rayleigh Equation and Somigliana Waves

Autor: G. F. PANZA, A. L. LEVSHIN
Jazyk: angličtina
Rok vydání: 1970
Předmět:
Zdroj: Annals of Geophysics, Vol 23, Iss 1, Pp 45-55 (1970)
Druh dokumentu: article
ISSN: 1593-5213
2037-416X
DOI: 10.4401/ag-5142
Popis: The extra roots of the Rayleigh equation for an elastichalfspace contribute to the solution only for large enough values of thePoisson coefficient (a > 0.309). One of them corresponds to leaking modeswith the phase velocity less than the velocity of the longitudinal wave.A similar wave with distinct dispersion may exists in the case where anelastic halfspace is covered by a thin layer with lower velocities of elasticwaves. The thickness of a layer should be not too small in comparisonwith the wave length.
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