Overview of Reduction Methods and Their Implementation Into Finite-Element Local-to-Global Techniques

Abstract

Reduction methods are used to reduce the number of degrees of freedom in a finite-element (FE) model, typically at the expense of high-fidelity solutions. The reduced solution's fidelity depends on the reduction method implemented. Most of the reduction methods described in this report were developed to efficiently determine the natural frequencies and mode shapes of large FE models. It is the goal of this report to briefly review these reduction methods and describe their implementation into feasible FE local-to-global analysis techniques. Local-to-global techniques are also part of the family of model reduction methods, but are normally used for structural analysis purposes.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA428177

Entities

People

  • David A. Hopkins
  • Michael A. Minnicino Ii

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Boundaries
  • Civil Engineering
  • Composite Materials
  • Eigenvalues
  • Electronic Components
  • Engineering
  • Equations
  • Frequency
  • Frequency Response
  • Materials
  • Military Research
  • Modal Analysis
  • Reliability
  • Resonant Frequency
  • Structural Analysis
  • Structural Response

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Computational Fluid Dynamics (CFD)