Abstract
SUMMARY We present reliable finite element discretizations based on displacement/pressure interpolations for the analysis of acoustic fluid—structure interaction problems. The finite element interpolations are selected using the inf-sup condition, and emphasis is given to the fact that the boundary conditions must satisfy the mass and momentum conservation. We show that with our analysis procedure no spurious non-zero frequencies are encountered, as heretofore calculated with other displacement-based discretizations. ( 1997 by John Wiley & Sons, Ltd.
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