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We present an overview of research developments related to the nonlinear vibroacoustic modulation technique used for structural damage detection. The method of interest is based on nonlinear interactions of a low-frequency pumping wave and a high-frequency probing wave. These two waves are introduced to monitored structures simultaneously. Then the presence of damage is exhibited by additional frequency components that result from nonlinear damage-wave interactions. A vast amount of research has been performed in this area over the last two decades. We aim to present the state-of-the-art of these developments. The major focus is on monitoring approaches, modeling aspects, actuation/sensing, signal processing, and application examples.
Pieczonka, Klepka, Martowicz, and Staszewski: Nonlinear vibroacoustic wave modulations for structural damage detection: an overview
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Lukasz Pieczonka, Andrzej Klepka, Adam Martowicz, Wieslaw J. Staszewski, "Nonlinear vibroacoustic wave modulations for structural damage detection: an overview," Opt. Eng. 55(1) 011005 (11 September 2015) https://doi.org/10.1117/1.OE.55.1.011005