Identification of Dynamic Structures with Special Attention to Damping Matrix Representation

Abstract

In finite element modeling, damping parameters, structural characteristics of joints, and boundary conditions are very difficult to estimate, causing discrepancy between analytic results and actual measured behavior. Various methods of structural identification were studied and compared in terms of their basic assumptions and advantages. A nonlinear optimization based method was though to be promising for the identification of structures with highly uncertain structural parameters. An algorithm was developed to construct the damping matrix from experimental data. A computer program was developed for verification of this method. The method appeared to work well for lightly, viscously damped structures.

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Document Details

Document Type
Technical Report
Publication Date
Jan 13, 1992
Accession Number
ADA248020

Entities

People

  • Jay H. Kim

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Composite Materials
  • Computational Science
  • Computer Programs
  • Computers
  • Dynamics
  • Eigenvalues
  • Eigenvectors
  • Engineering
  • Equations
  • Equations Of Motion
  • Experimental Data
  • Finite Element Analysis
  • Frequency
  • Governments
  • Identification
  • Resonant Frequency

Readers

  • Computational Modeling and Simulation
  • Structural Dynamics.