Optimal Solution Selection for Sensitivity-Based Finite Element Model Updating and Structural Damage Detection.

Abstract

The finite element model has become the standard way in which complex structural systems are modeled, analyzed, and the effects of loading simulated. A new method is developed for comparing the finite element simulation to experimental data, so the model can be validated, which is a critical step before a model can be used to simulate the system. An optimization process for finite element structural dynamic models utilizing sensitivity based updating is applied to the model updating and damage detection problems. Candidate solutions are generated for the comparison of experimental frequencies to analytical frequencies, with mode shape comparison used as the selection criteria for the optimal solution. The method is applied to spatially complete simulations and to spatially incomplete experimental data which includes the model validation of a simple airplane model, and the damage localization in composite and steel beams with known installed damage. (AN)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1995
Accession Number
ADA306053

Entities

People

  • Jay A. Renken

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Aircrafts
  • Airplanes
  • Composite Materials
  • Computational Science
  • Damage Detection
  • Detection
  • Dynamic Response
  • Experimental Data
  • Frequency
  • Frequency Shift
  • Materials
  • Measurement
  • Mechanical Engineering
  • Modal Analysis
  • Physical Properties
  • Resonant Frequency
  • Simulations

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Structural Health Monitoring of Composite Structures.