Nonlinear vibroacoustic wave modulations for structural damage detection: an overview

TLDR

A vast amount of research has been performed in this area over the last two decades. We present an overview of research developments related to the nonlinear vibroacoustic modulation technique used for structural damage detection and aim to present the state‑of‑the‑art of these developments. The method relies on nonlinear interactions between a low‑frequency pumping wave and a high‑frequency probing wave introduced simultaneously into monitored structures, producing additional frequency components that reveal damage, and the review focuses on monitoring approaches, modeling, actuation/sensing, signal processing, and application examples.

Abstract

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.