Detection of missing fastener based on vibration mode analysis using fiber Bragg grating (FBG) sensors

Akiyoshi Shimada; Kei Urabe; Yoshihiro Kikushima; Jun Takahashi; Kazuro Kageyama

doi:10.1117/12.483453

5 August 2003 Detection of missing fastener based on vibration mode analysis using fiber Bragg grating (FBG) sensors

Akiyoshi Shimada, Kei Urabe, Yoshihiro Kikushima, Jun Takahashi, Kazuro Kageyama

Proceedings Volume 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems; (2003) https://doi.org/10.1117/12.483453
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

We propose a damage detection method based on frequency responses measured by FBG sensors during vibration tests. When random noise vibrates a laminated composite panel and a stiffener fastened with bolts, the peak gain of the resonance frequencies can be obtained. We calculated the correlation coefficient of the normalized gain for the frequency responses, and then predicted the location of a missing bolt. This method will make possible to predict the location of damage with a limited number of FBG sensors while a structure is vibrating even if the excitation point changes.

Citation Download Citation

Akiyoshi Shimada, Kei Urabe, Yoshihiro Kikushima, Jun Takahashi, and Kazuro Kageyama "Detection of missing fastener based on vibration mode analysis using fiber Bragg grating (FBG) sensors", Proc. SPIE 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems, (5 August 2003); https://doi.org/10.1117/12.483453

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