Accession Number:

ADA445726

Title:

Iterative Substructuring With Lagrange Multipliers for Coupled Fluid-Solid Scattering

Descriptive Note:

Conference paper

Corporate Author:

COLORADO UNIV AT DENVER

Personal Author(s):

• Mandel, Jan

Report Date:

2003-01-01

Pagination or Media Count:

13.0

Abstract:

We have proposed an iterative method for the solution of linear systems arising from finite element discretization of the time harmonic acoustics of coupled fluid-solid systems in fluid pressure and solid displacement formulation. The method extended the FETI-H method for the Helmholtz equation 4, 6, 7, 12 to coupled fluid-elastic acoustics. In this paper, we investigate a stabilization of the discrete coupled system for the case when the solid scatterer is at resonance and investigate computationally the convergence of the iterative substructuring method for the modified system.

Descriptors:

• *SOLUTIONS(GENERAL)
• *ACOUSTIC SCATTERING
• *ITERATIONS
• SOLIDS
• RESONANCE
• HELMHOLTZ EQUATIONS
• ELASTIC SCATTERING
• FLUIDS
• DEGREES OF FREEDOM

Subject Categories:

• Numerical Mathematics
• Theoretical Mathematics
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE