Eigenvalue Analysis of Large, Complex Structures by the Static Condensation Technique.

Abstract

FREEDOM, Equations of motion, Condensation, Graphics, Computer programmingFinite element analysis, *Static structural analysis, Computer graphicsThe static condensation technique, as applied to the eigenvalue analysis of large complex structures, is evaluated using ICES/STRUDL. Accuracy is verified by two simple test problems. A real-life problem of considerable magnitude delineates the technique's merits as problem size varies. Backtransformation of results to condensed degrees of freedom is shown to be expensive if not really needed (i.e., if member forces are not required). Also shown essential for large, complex structures are: good banding algorithm, exhibiting reductions in solution time, lumped-mass approach to provide comparable accuracy at less cost over the consistent-mass approach, and graphics package to process input data and present output graphically. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 19, 1973
Accession Number
AD0769856

Entities

People

  • Stephen S. Britten

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Computers
  • Condensation
  • Eigenvalues
  • Equations
  • Equations Of Motion
  • Graphics
  • Mathematics
  • Structural Analysis

Fields of Study

  • Physics

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Computer Science.
  • Structural Dynamics.