Health monitoring of beam structures using traveling waves induced by ambient loads

Arata Masuda; Akira Sone; Shinya Yamamoto

doi:10.1117/12.540046

29 July 2004 Health monitoring of beam structures using traveling waves induced by ambient loads

Arata Masuda, Akira Sone, Shinya Yamamoto

Proceedings Volume 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2004) https://doi.org/10.1117/12.540046
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

In this paper, we develop a damage identification method for beam structures based on the measurement of propagating waves excited by ambient loads. First, the ambient vibration data acquired by arrayed sensors are separated into the forward-going and the backward-going wave components utilizing the dispersion relation in the frequency domain. Then, the transfer function between an in-coming and out-going pair of the wave components is identified, whose inverse Fourier transform represents the out-going wave packet from a particular region of the structure in response to an impulsive incident. If there exists a crack at a certain location, additional echoes are observed in the identified impulse response, and the arrival time of the echoes would indicate the location of the crack. Experiments show that the proposed method is capable to detect the existence and the position of a crack only using a couple of sensors.

Citation Download Citation

Arata Masuda, Akira Sone, and Shinya Yamamoto "Health monitoring of beam structures using traveling waves induced by ambient loads", Proc. SPIE 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (29 July 2004); https://doi.org/10.1117/12.540046

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