A Technique to Locate Damage in a Beam Using Non-Resonant Frequency Response Vibration Data

Abstract

This paper investigates a vibrational technique for the non destructive identification of damage in beams. There has been much work investigating the variation of natural frequencies with damage, but much less on the effect of damage on mode shapes. Very little attention has been directed to off-resonant performance. This paper develops a technique for identifying the location of structural damage in a beam using experimental frequency response function data. The procedure specifically has no requirement for knowledge about the undamaged structure. Although the technique is based on modal superposition, a modal analysis of the measured data is not required, and offers no additional information. This work was brought about by the need to locate damage in difficult-to-reach structures such as the underwater part of offshore oil platforms, and space structures such as satellites and the space station.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1997
Accession Number
ADA359124

Entities

People

  • Colin P. Ratcliffe

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Civil Engineering
  • Composite Materials
  • Concrete
  • Damage Detection
  • Detection
  • Engineering
  • Frequency Response
  • Laminates
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Modal Analysis
  • Monitoring
  • Resonant Frequency
  • Shape
  • Structural Engineering
  • United States Naval Academy

Fields of Study

  • Engineering

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Structural Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Space