Improving the high frequency performance of AVAST

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Authors
  1. Brennan, D.P.
  2. Covill, J.D.
Corporate Authors
Defence R&D Canada - 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 modeling of the physical environment more realistic, while ensuring that the code runs as efficiently as possible. To this end several new features have been added. These include upgrading the existing library of fluid panels to in order to provide user’s with higher order elements better suited for modeling structures with a significant degree of curvature, developing a UNIX version of the AVAST software designed to take full advantage of DRDC’s multi-processor SUNFIRE workstation, and the implementation of a high frequency Kirchhoff scattering capability. In addition, a series of parametric studies involving sound scattered from rigid structures having impedance type boundary conditions were also conducted using the latest version of the AVAST solver.

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Keywords
UNIX;AVAST;Kirchhoff;underwater/structural acoustics;finite element method (FEM)
Report Number
DRDC-ATLANTIC-CR-2005-051 — Contract Report
Date of publication
01 Aug 2005
Number of Pages
46
DSTKIM No
CA046300
CANDIS No
806672
Format(s):
Electronic Document(PDF)

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