Enhancements of the Elasto Acoustic Capabilities of AVAST

Abstract

The development and incorporation of the latest enhancements to the AVAST code are described. The purpose of this work was to make the modelling of the elasto-acoustic interaction more realistic, while ensuring that the code runs as efficiently as possible. To this end, several new features have been added. These include the option to use the wet modes of the structure when generating the mobility matrix, the option to generate a structural impedance matrix based upon the mass, damping and stiffness matrices, the implementation of a multi-frequency boundary integral equation method, decomposition of the current AVAST program modules in order to allow for restart analyses, implementation of a convergence acceleration technique for use in the calculation of the waveguide Green's function, incorporation of the hypersingular Burton and Millar boundary integral equation method and the implementation of a coupling between the fluid and structural models for the transient case.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1995
Accession Number
AD1003703

Entities

People

  • D. P. Brennan

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Classification
  • Convergence
  • Couplings
  • Decomposition
  • Equations
  • Frequency
  • Impedance
  • Integral Equations
  • Integrals
  • Mobility
  • Security
  • Stiffness
  • Waveguides

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Structural Dynamics.