✦ LIBER ✦

DISPLACEMENT/PRESSURE BASED MIXED FINITE ELEMENT FORMULATIONS FOR ACOUSTIC FLUID–STRUCTURE INTERACTION PROBLEMS

✍ Scribed by XIAODONG WANG; KLAUS-JÜRGEN BATHE

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 409 KB
Volume: 40
Category: Article
ISSN: 0029-5981
DOI: 10.1002/(sici)1097-0207(19970615)40:11<2001::aid-nme152>3.0.co;2-w

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✦ Synopsis

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.