Non-Contact Impact Source Localization in Composite Symmetry Panels Based on A0 Mode of Lamb Waves

Author:

Wang Ziping12ORCID,Zhang Jiazhen12,Cui Hangrui12,Gorgin Rahim12,Zhang Yang3

Affiliation:

1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China

2. National Center for International Research on Structural Health Management of Critical Components, Jiangsu University, Zhenjiang 212013, China

3. Institute of Fluid-Flow Machinery, Polish Academy of Sciences, 80-231 Gdańsk, Poland

Abstract

Traditional methods for detecting damage in engineering structures often use offline static damage detection. To enable the real-time and precise identification of dynamic damage while maintaining symmetry in engineering structures, this study primarily concentrates on isotropic plate structures widely employed in engineering. Moreover, fiberglass board composite plates were opted as a specific research object. By utilizing the weak S0 mode signals generated by low-frequency ultrasonic Lamb waves, the non-stationary A0 wave signals in the composite symmetry plate structure are collected using the non-contact SLDV (Scanning Laser Doppler Vibrometer) technique. The frequency characteristic parameters in the vibration signals are obtained through HHT (Hilbert–Huang Transform) analysis, followed by filtering and noise reduction. Finally, the circular trajectory intersection method is employed to accurately locate dynamic damage sources in plate structures with different material properties, thereby validating the positioning effect of contact sensors in detecting impacts caused by random impulses.

Funder

China Scholarship Council

National Natural Science Foundation of China

Foreign Expert Project of Chinese Ministry of Science Technology

Postgraduate Research & Practice Innovation Program of Jiangsu Province

Publisher

MDPI AG

Subject

Physics and Astronomy (miscellaneous),General Mathematics,Chemistry (miscellaneous),Computer Science (miscellaneous)

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