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Sensor Technologies for Civil Infrastructures, Volume 1 by Hoon Sohn, Jerome P. Lynch, Ming L. Wang

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7

Nonlinear acoustic and ultrasound methods for assessing and monitoring civil infrastructures

M. Meo,    University of Bath, UK

Abstract:

This chapter presents an overview of nonlinear acoustic and ultrasound methods and their application to civil structures. The major nonlinear ultrasonic methods are thoroughly reviewed and the underlying physics and laboratory studies are reported. In particular, phenomena such as higher harmonic generation, subharmonic generation, nonlinear resonance, and mixed frequency response are discussed and the basic physical mechanism of each phenomenon is introduced with applications for evaluation of damage in civil structures. Research results to date show higher sensitivity of these techniques than the conventional ...

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