IMPLEMENTATION OF COMPONENT MODE SYNTHESIS IN THE VAST PROGRAM

Authors
  1. Smith, M.J.
  2. Hutton, S.G.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);British Columbia Univ, Vancouver BC (CAN) Dept of Mechanical Engineering
Abstract
Several variations of component mode synthesis, a procedure for computing the natural frequencies and mode shapes of a structure, are described. These methods treat a structure as an assemblage of components, with each component being transformed to a reduced, modal representation. Synthesis of these components yield a reduced-order eigenvalue problem, from which the lower structural modes can be calculated with high accuracy. This procedure enables complex structures to be reduced to component form. Each component can then be treated individually and modifications to one area do not involve re-analysis of non-modified components. A fixed-interface component mode synthesis method is implemented in the computer program, VAST. The method adds free vibration modes of the structural components to the static condensation procedure used in the substructuring/superelement option of the program. TRUNCATED
Report Number
DREA-CR-90-449 — Contractor Report
Date of publication
15 Sep 1990
Number of Pages
115
DSTKIM No
91-03475
CANDIS No
70666
Format(s):
Hardcopy;Originator's fiche received by DSIS

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