Partitioned Transient Analysis Procedures for Coupled-Field Problems: Accuracy Analysis.

Abstract

Partitioned solution procedures for direct time integration of second-order coupled-field systems are studied from the standpoint of accuracy. Such procedures are derived by three formulation steps: implicit integration of coupled governing equations, algebraic partitioning, and extrapolation to advance the solution. It is shown that the combined effect of partition, extrapolation and computational paths, dictates the choice of stable extrapolators and the preservation of rigid-body motions. Stable extrapolators for various computational paths are derived and implementation-extrapolator combinations which preserve rigid-body motions are identified. A spectral analysis shows that the partition itself, when stable, affects primarily frequency distortion. Finally, the advantages and shortcomings of five partitioned procedures are discussed as a guide to practical apppplications. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1979
Accession Number
ADA075685

Entities

People

  • C. A. Felippa
  • K. C. Park

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • C4I
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Boundaries
  • Boundary Layer
  • Computational Science
  • Convergence
  • Difference Equations
  • Differential Equations
  • Distortion
  • Elements
  • Equations
  • Equations Of Motion
  • Errors
  • Extrapolation
  • Frequency
  • Mechanics
  • Phase Shift

Readers

  • Control Systems Engineering.
  • Marine Propulsion Engineering and Naval Architecture
  • Systems Analysis and Design