Resonant Scattering of Elastic Waves from Spherical Solid Inclusions.
Abstract
Previous investigations concerning the scattering of elastic waves from solid spherical inclusions have furnished expressions for the scattering cross sections which, upon numerical evaluation, exhibited resonance-like features as a function of frequency. In the present work, we study these resonances in a fashion suggested by the resonance theory of acoustic scattering. The resonances of the solid inclusions, exemplified by iron or lucite spheres imbedded in an aluminum matrix, are found numerically in the individual normal-mode scattering amplitudes, and are interpreted in terms of phase-matched circumferential waves. Dispersion curves for the phase velocities of the latter are obtained, exhibiting two families of waves of different type. Finally, the connection of these waves with the Stoneley waves on the boundary between two flat half-spaces is noted in the high-frequency limit.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1979
- Accession Number
- ADA075659
Entities
People
- Herbert Ueberall
- Lawrence Flax
Organizations
- The Catholic University of America