FINITE ELEMENT MODELLING OF THE VIBRATION OF STIFFENED FLAT PLATES IN AIR

Authors
  1. Stredulinsky, D.C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The technical memorandum considers the prediction of the natural frequencies and modes of vibration for stiffened and unstiffened flat rectangular plates in air using the finite element program VAST. Two modelling options were used: quadrilateral 8-noded shell elements combined with 3-noded beam elements (solid rectangular cross-section), and 3-noded triangular plate elements combined with 2-noded general beam elements. Predictions for plates with simply supported and free-free boundary conditions are compared with results obtained by the University of Sherbrooke using semi-analytical methods developed as part of a computer program for prediction of sound radiation from a coupled planar structure. The VAST finite element predictions are also compared to experimental results obtained by the University of Sherbrooke with free-free plates and an ANSYS finite element analysis of a simply supported, stiffened plate.
Report Number
DREA-TM-92-219 — Technical Memorandum
Date of publication
01 Oct 1992
Number of Pages
38
DSTKIM No
93-00361
CANDIS No
127523
Format(s):
Hardcopy;Originator's fiche received by DSIS

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