Problems of Spectral Analysis in Dispersion Tests

by R. A. Douglas, North Carolina State Univ, Raleigh, NC, USA,
G. L. Eller, North Carolina State Univ, Raleigh, NC, USA,

Document Type: Proceeding Paper

Part of: Dynamic Response of Structures


The use of dispersive surface waves and spectral analysis methods is new to the nondestructive testing of airfield pavements. Such tests are to determine whether mechanical properties of the individual layers of a pavement structure are deteriorating. The problem becomes one of the proper analysis of test results and of the need for careful examination of the problem before applying common techniques of data processing. Dispersion analysis based on conventional methods of spectral analysis and data processing is shown to be inadequate. Special signal processing is required, and a new partial transform.

Subject Headings: Spectral analysis | Surface waves | Signal processing | Mechanical properties | Structural behavior | Airport and airfield pavements | Wave spectrum | Nondestructive tests

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