Iterative Substructuring With Lagrange Multipliers for Coupled Fluid-Solid Scattering

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADA445726

Entities

People

  • Jan Mandel

Organizations

  • University of Colorado Boulder

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Acoustics
  • Equations
  • Helmholtz Equations
  • Information Operations
  • Language
  • Linear Systems
  • Mathematics
  • Scattering

Fields of Study

  • Mathematics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)