PREDICTION OF ACOUSTIC CAVITY MODES BY FINITE ELEMENT METHODS

Authors
  1. Vernon, T.A.
  2. Tang, S.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A finite element method for acoustic cavity modal analysis is presented. The approach utilizes the VAST finite element program eigensolution routines operating on equivalent acoustic mass and stiffness matrices generated from a program ACOUSTIC. Both closed and open cavities can be treated, within the assumption of rigid boundaries. Two elements have been implemented in ACOUSTIC: a 20-noded isoparametric brick element and an 8-noded isoparametric axisymmetric element. The performance of the analysis system has been evaluated via comparison to both analytical and experimental results, and good agreement has been found.
Report Number
DREA-TC-89-302 — Technical Communication
Date of publication
15 Mar 1989
Number of Pages
23
DSTKIM No
89-01666
CANDIS No
59596
Format(s):
Hardcopy;Originator's fiche received by DSIS

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