A Test of the Capabilities of CHIEF in the Numerical Calculation of Acoustic Radiation from Arbitrary Surfaces

Abstract

The computer program CHIEF was designed by Schenck and Barach of the Naval Undersea Research and Development Center to obtain approximate solutions to exterior steady-state acoustic radiation problems for surfaces of arbitrary shape vibrating with a prescribed normal velocity. To test its capabilities as a research tool, CHIEF was applied to several problems for which accurate answers have been obtained using harmonic expansions. The accuracy and computation time of the results using CHIEF are discussed in terms of the surface subdivision scheme and the number of Gaussian quadrature points used to evaluate the Helmholtz integrals. In addition, new input subroutines to CHIEF which provide numerous geometrical options are also discussed.

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Document Details

Document Type
Technical Report
Publication Date
Nov 12, 1970
Accession Number
AD0716019

Entities

People

  • A. L. Van Buren

Organizations

  • United States Naval Research Laboratory

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  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Cartesian Coordinates
  • Computer Programs
  • Computers
  • Conversion
  • Elastic Waves
  • Equations
  • Far Field
  • Frequency
  • Gaussian Quadrature
  • Geometry
  • Near Field
  • Pressure Distribution
  • Symmetry
  • Wave Functions
  • Waves

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  • Computer Science.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Maritime and Naval Warfare Studies