ACOUSTIC RADIATION FROM SUBMERGED ELASTIC STRUCTURES. PHASE III

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 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 the implementation of the recently published CHIEF block method for handling numerical ill-conditioning at characteristic frequencies, the addition of a finite depth waveguide domain Green's function, transient radiation and scattering modelling features, the capability to model multiple bodies, and the incorporation of a modified version of the Helmholtz integral equation for bodies sitting on, or in contact with, an infinite plane. In addition, a series of tests which examined the sensitivity of the results generated by the AVAST suite due to uncertainties in fluid sound speed, density, and excitation frequency were completed.
Report Number
DREA-CR-94-412;TR-93-30 — Contractor Report
Date of publication
01 Dec 1993
Number of Pages
73
DSTKIM No
94-05030
CANDIS No
144580
Format(s):
Hardcopy;Originator's fiche received by DSIS

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