Performance Of Higher Order Elements In The
Analysis Of A 3D Acoustic Wave Scattering
Author(s)
L. Godinho, A. Tadeu & P. Santos
Abstract
The performance of constant, linear and quadratic boundary elements in the
analysis of three dimensional acoustic scattering is addressed in this paper. A
fixed cylindrical circular cavity of infinite length submerged in a homogeneous
fluid medium, and subjected to a pressure point source, for which closed form
solutions are known, is used to evaluated the Boundary Element Method (BEM)
error for a wide range of frequencies and wavenumbers.
First, the position of dominant BEM errors, in the frequency versus spatial
wavenumber domains are identified and related to the natural modes of vibration
of the cylindrical fixed circular cavity. Then, the errors committed by using
constant, linear and quadratic elements are compared when the inclusion is
modeled with the same number of nodal points
Keywords
Related Book
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