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A Variable Order Infinite Acoustic Wave Envelope Element

✍ Scribed by L. Cremers; K.R. Fyfe; J.P. Coyette

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
801 KB
Volume
171
Category
Article
ISSN
0022-460X

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✦ Synopsis

A new infinite wave envelope element for analyzing acoustic radiation and scattering problems in an unbounded domain is presented. The element is based on a finite to infinite geometry mapping and a wave representation within the shape function. It allows for the specification of an arbitrary number of acoustic degrees of freedom in the radial infinite direction, yielding a (1 / r^{n}) expansion for the proper modelling of the amplitude decay. Both two-dimensional and axisymmetric problems are presented to show the use and accuracy of this (n)th order infinite wave envelope element. Numerical results are compared with analytical and boundary element solutions.

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