ENHANCEMENTS OF THE ELASTO-OPTICS CAPABILITIES OF AVAST

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Authors
  1. Brennan, D.P.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
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.
Keywords
Elasto-acoustic;Waveguide;Transients;Fluid-structure interaction;Boundary integral equation;AVAST
Report Number
DREA-CR-95-461;MARTEC-TR-95-13 — Contractor Report
Date of publication
01 Apr 1995
Number of Pages
67
DSTKIM No
96-00604
CANDIS No
154193
Format(s):
Document Image stored on Optical Disk;Hardcopy

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