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Sensors 2016, 16(10), 1583; doi:10.3390/s16101583

Strain Modal Analysis of Small and Light Pipes Using Distributed Fibre Bragg Grating Sensors

1
School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
2
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
3
School of Engineering, University of Birmingham, Birmingham B15 2TT, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Christophe Caucheteur and Tuan Guo
Received: 29 July 2016 / Revised: 3 September 2016 / Accepted: 13 September 2016 / Published: 25 September 2016
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
View Full-Text   |   Download PDF [3855 KB, uploaded 28 September 2016]   |  

Abstract

Vibration fatigue failure is a critical problem of hydraulic pipes under severe working conditions. Strain modal testing of small and light pipes is a good option for dynamic characteristic evaluation, structural health monitoring and damage identification. Unique features such as small size, light weight, and high multiplexing capability enable Fibre Bragg Grating (FBG) sensors to measure structural dynamic responses where sensor size and placement are critical. In this paper, experimental strain modal analysis of pipes using distributed FBG sensors ispresented. Strain modal analysis and parameter identification methods are introduced. Experimental strain modal testing and finite element analysis for a cantilever pipe have been carried out. The analysis results indicate that the natural frequencies and strain mode shapes of the tested pipe acquired by FBG sensors are in good agreement with the results obtained by a reference accelerometer and simulation outputs. The strain modal parameters of a hydraulic pipe were obtained by the proposed strain modal testing method. FBG sensors have been shown to be useful in the experimental strain modal analysis of small and light pipes in mechanical, aeronautic and aerospace applications. View Full-Text
Keywords: small and light pipe; strain modal analysis; Fibre Bragg Grating; strain mode shape small and light pipe; strain modal analysis; Fibre Bragg Grating; strain mode shape
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MDPI and ACS Style

Huang, J.; Zhou, Z.; Zhang, L.; Chen, J.; Ji, C.; Pham, D.T. Strain Modal Analysis of Small and Light Pipes Using Distributed Fibre Bragg Grating Sensors. Sensors 2016, 16, 1583.

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