A VARIABLE ORDER INFINITE ACOUSTIC-WAVE ENVELOPE ELEMENT

被引：50

作者：

CREMERS, L ^{[1
]}

FYFE, KR ^{[1
]}

COYETTE, JP ^{[1
]}

机构：

[1] NUMER INTEGRAT TECHNOL NV,LOUVAIN,BELGIUM

来源：

JOURNAL OF SOUND AND VIBRATION | 1994年 / 171卷 / 04期

关键词：

D O I：

10.1006/jsvi.1994.1136

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

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'' 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 nth order infinite wave envelope element. Numerical results are compared with analytical and boundary element solutions.

引用

页码：483 / 508

页数：26

共 32 条

[1]

ASTLEY RJ, 1984, AIAA J, V22, P1719, DOI 10.2514/3.8843

[2] A NOTE ON THE UTILITY OF A WAVE ENVELOPE APPROACH IN FINITE-ELEMENT DUCT TRANSMISSION STUDIES [J].