WIT Press


Hybrid Boundary Element Formulation In Acoustics

Price

Free (open access)

Paper DOI

10.2495/BT010111

Volume

27

Pages

10

Published

2001

Size

1,009 kb

Author(s)

L. Gaul, M. Wagner

Abstract

A symmetric hybrid boundary element method in the frequency domain is introduced for the computation of acoustic radiation and scattering in closed and infinite domains. The Hybrid Stress Boundary Element Method (HSBEM) in a frequency domain formulation is based on the dynamical Hellinger-Reissner potential and leads to a Hermit ian, frequency-dependent stiffness equation. As compared to previous results published by the au- thors, new considerations concerning the interpretation of singular contri- butions in the stiffness matrix are communicated. The field variables are separated into boundary variables, which are approximated by piece wise polynomial functions, and domain variables, which are approximated by a superposition of singular fundamental solutions. This approximation can- cels the domain integral over the equation of motion in the hybrid pri

Keywords