Implementation of SEREP Into LLNL Dyna3d for Global/Local Analysis

Abstract

Reduction methods are used to reduce the number of degrees of freedom in a finite-element (FE) model at the expense of high-fidelity solutions. The System Equivalent Reduction/Expansion Process (SEREP) is an attractive reduction technique since it can preserve the modal fidelity of the FE model up to a user-defined level. This capability allow for a more accurate representation of the physical structure. In this report, the feasibility of incorporating SEREP in the FE method for both discrete spring-mass-damper and distributed systems is explored. Modeling and numerical issues related to using SEREP as a superelement technique are examined and discussed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2005
Accession Number
ADA438604

Entities

People

  • David A. Hopkins
  • Michael A. Minnicino Ii

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Composite Materials
  • Eigenvalues
  • Electronic Components
  • Engineering
  • Equations
  • Equations Of Motion
  • Frequency
  • Materials
  • Military Research
  • Modal Analysis
  • Molecular Dynamics
  • Numerical Analysis
  • Reliability
  • Resonant Frequency
  • Standards
  • Test And Evaluation

Readers

  • Computational Fluid Dynamics (CFD)
  • Computational Modeling and Simulation