Accession Number:

ADA209741

Title:

Analysis of a Limiting-Amplitude Problem in Acousto-Elastic Interactions, 1

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1989-05-15

Pagination or Media Count:

63.0

Abstract:

Time-harmonic scattering and radiation by an elastic body into an inviscid fluid is studied as a problem of limiting amplitude. By supposing that one knows all about the exterior Neumann-radiation problem and a certain interior traction eigenvalue problem, the interface problem is reduced to an interior one with a nonlocal boundary condition, which is shown to be well-posed in weak sense, modulo the satisfaction of a solvability condition. The convergence of a solution-approximating Galerkin procedure is established. It is shown that one can compute the acoustic field without examining the mentioned eigenvalue problem.

Subject Categories:

  • Acoustics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE