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Theoretical investigation of positional influence of FBG sensors for structural health monitoring of offshore structures.

Johny, Jincy; Summers, Jade; Bhavsar, Kaushalkumar; Joseph, Ginson P; Fung, Wai Keung; Prabhu, Radhakrishna

Authors

Jincy Johny j.johny@rgu.ac.uk

Jade Summers

Kaushalkumar Bhavsar

Ginson P Joseph

Wai Keung Fung

Radhakrishna Prabhu

Abstract

Fibre Bragg Grating (FBG) is a key technology for condition monitoring of different offshore oil and gas structures. FBG sensors are used to sense different physical parameters such as strain, temperature, vibration, etc. This paper investigates the effect of FBG sensor positions on the reflected sensing signal, to optimise the sensor positioning plan for structural health monitoring of offshore structures. Theoretical investigations were carried out on a cantilever beam to analyze the strain effects. Effect of different cantilever beam shapes, materials and their thickness on strain was investigated. Theoretical studies were also carried out to evaluate the strain sensitivities of FBG sensors. Furthermore, micrometer displacement based strain analysis of cantilever beam was carried out using FBG sensors and electrical strain gauges to study the positional influence and compared it with the theoretical results obtained.

Start Date Jun 19, 2017
Publication Date Oct 26, 2017
Publisher Institute of Electrical and Electronics Engineers
Article Number 8084976
Pages 2406-2410
ISBN 9781538621110
Institution Citation JOHNY, J., SUMMERS, J., BHAVSAR, K., JOSEPH, G.P., FUNG, W.-K. and PRABHU, R. 2017. Theoretical investigation of positional influence of FBG sensors for structural health monitoring of offshore structures. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084976, pages 2406-2410. Available from: https://doi.org/10.1109/OCEANSE.2017.8084976
DOI https://doi.org/10.1109/OCEANSE.2017.8084976
Keywords Fibre optic sensors; Strain analysis; Cantilever beam structure; FBG

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