Application Of The Modal Expansion Technique To Improve The Results Of
FEM/BEM Acoustic Radiation
Author(s)
C. Bernad, L. Vila & F. Buil
Abstract
Application of the modal expansion technique
to improve the results of FEM/BEM acoustic
radiation
C. Bernad, L. Vila & F. Buil.
Department of Mechanics and New Materials,
Instituto Tecnoldgico de Aragdn, Spain
Abstract
The use of FEMIBEM models in the prediction of sound radiation by vibrating
structures is a well-known method already available in different software
packages. There are many papers dealing with the numerical precision of the
acoustic BEM methods, but it is clear that the accuracy of their predictions is
mainly affected by the correct description of the problem boundary conditions,
especially the surface normal velocities.
In this work, a simple test case consisting of a vibrating thin metal plate is solved
using different methods to describe the normal velocities. FE structural model,
measured data assigned to different surfaces and a hybrid technique called
"modal expansion" are used.
The aim of this paper is to evaluate the differences in the prediction using the
different
Keywords
Related Book
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