Efficient Computation of Nonlinear Transient Structural Synthesis for Seismic Isolation

Abstract

A method of structural synthesis is presented using a recursive computational process. A structure can be modeled entirely linearly, with localized nonlinearities included as synthesized forces. The method allows retention of only the degrees of freedom (DOF) of interest, including, at a minimum, the DOF at which nonlinearities are applied. The method is illustrated using an n-degree of freedom finite element model of a simple structure. The method is shown to adjust the response of the system based on addition of a nonlinear base isolator. Finally, the method is compared to MATLAB's ODE45 function as a measure of accuracy and efficiency. The method is theoretically exact, and results in order of magnitude decreases in computational time for modification analysis.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1999
Accession Number
ADA362911

Entities

People

  • Cliff P. Pearce

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Computational Science
  • Computations
  • Differential Equations
  • Dynamic Response
  • Efficiency
  • Eigenvalues
  • Engineering
  • Equations
  • Equations Of Motion
  • Floating Point Operations
  • Frequency
  • Grids
  • Mechanical Engineering
  • Resonant Frequency
  • Three Dimensional
  • United States Naval Academy

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Control Systems Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)