Diagnosis of Damage in SDF Structures.

Abstract

A technique for the diagnosis of damage in hysteretic structures is developed. A hysteretic SDF system is modeled using a higher-order linear ordinary differential equation. Stochastic, dynamic inputs are generated and used to represent field inputs. The response on a hysteretic structure on each input is computed. The generated inputs and computed responses are used to identify the parameters of the higher-order linear model. Then the energy dissipated by the hysteretic structure and its linear model are computed and compared. It is shown that the energy dissipated by a hysteretic structure is accurately estimated by the energy dissipated in its linear model, even when the measured input and response records include measurement noise. Numerical examples are presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1982
Accession Number
ADA120183

Entities

People

  • Frederick D. Ju
  • Ming-liang Wang
  • Thomas L. Paez

Organizations

  • University of New Mexico

Tags

DTIC Thesaurus Topics

  • Air Force
  • Computer Programs
  • Differential Equations
  • Engineering
  • Equations
  • Error Analysis
  • Estimators
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Integrals
  • Linear Systems
  • New Mexico
  • Nonlinear Systems
  • Probability
  • Probability Distributions
  • Random Variables

Fields of Study

  • Engineering

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Materials Science (Mechanical Engineering).