Multi-Channel Data Acquisition System for Nondestructive Testing of Airbase Facilities

Abstract

A multi-channel data acquisition system including a variety of sources and receivers was purchased to support research at Georgia Tech aimed at the Air Force's need to develop innovative airbase technologies. The equipment purchased comprises a complete multi-channel system for acquiring, processing, analyzing, and displaying dynamic signals. The system provides the capability to more accurately and rapidly perform nondestructive tests, and has thus far been used on two research efforts involving dynamic measurements. On one project involving a USAF Palace Knights student, a comprehensive experimental study was conducted to investigate the suitability of a modal analysis approach for identification of unknown pile embedment lengths. The second project is aimed at developing a non-invasive field technique that uses the dispersion properties of surface waves to determine the shear wave velocity profile at a site. The technique uses passive measurements of surface waves arising from microtremors and/or cultural noise such as traffic. Surface wave dispersion relationships are determined using frequency-wavenumber analyses.

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Document Details

Document Type
Technical Report
Publication Date
May 08, 1999
Accession Number
ADA363815

Entities

People

  • Glenn J. Rix

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Data Acquisition
  • Dispersions
  • Doppler Effect
  • Environmental Engineering
  • Frequency
  • Identification
  • Measurement
  • Military Operations
  • Modal Analysis
  • Nondestructive Testing
  • Resonant Frequency
  • Secondary Waves
  • Surface Waves
  • Vibration
  • Waves

Readers

  • Marine Mammal Biology
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.