Numerical Solution of Acoustic-Structure Interaction Problems

Abstract

The purpose of this report is to describe a technique for solving steady state coupled structure-acoustics problems that has been implemented by the transducer modeling group at the NOSC. This technique is applicable to both structural radiation problems and structural scattering problems. The structural portion of the problem is modeled using a standard finite element program. The particular program used at NOSC is MARTSAM, but virtually any general finite element code could be used. The acoustical portion of the problem is modeled using the Combined Helmholtz Integral Equation Formulation (CHIEF). This technique has been implemented at NOSC in a computer program that is also called CHIEF. This report describes a technique for solving steady coupled structure- acoustics problems. Keywords: Acoustic radiation; Acoustic scattering; Elastic structures; Submerged spherical shells; Transducer arrays; Low frequency target strength; Submarines.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1989
Accession Number
ADA211505

Entities

People

  • G. W. Benthien
  • H. A. Schenck

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustics
  • Computer Programs
  • Differential Equations
  • Eigenvalues
  • Equations
  • Far Field
  • Frequency
  • High Resolution
  • Integral Equations
  • Modulus Of Elasticity
  • Plane Waves
  • Radiation
  • Scattering
  • Scattering Cross Sections
  • Symmetry
  • Target Strength
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Dynamics.