Application study on FBG sensor applied to hull structural health monitoring

Shen, Wei; Yan, Rong; Xu, Lin; Tang, Guangning; Chen, Xialiang

doi:10.1016/j.ijleo.2015.04.046

Cited by 44 publications

(13 citation statements)

References 11 publications

(11 reference statements)

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“…Such a phenomenon can occur due to crack development or the angle between the sensor axis and the fibre reinforcement. Shen et al [37] analysed the possibility of applying an FBG sensor rosette to strain-monitoring in a ship hull during its operation. The analysis also contains a fatigue-loading influence analysis of the sensor itself, as well as its impact on the metal sample with the attached sensor.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Mieloszyk

2021

Vibration

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The paper presents the analysis of the possibility of fatigue crack detection and monitoring its propagation process using fibre Bragg grating (FBG) sensors. The investigations were carried out on an aluminium alloy sample (a part of the Mi-2 helicopter rotor blade). During the fatigue test, the sample was equipped with FBG sensors applied for strain measurement and the vibration-based strain monitoring. It was observed that the strain curves determined by the FBG sensors agreed well with the fatigue force profile. However, the strain curves were almost insensitive to the crack propagation process, except in the last stage of the test, when the crack length was equal to 25 mm. The strain values and the natural frequencies of the sample that were determined experimentally were compared with the values achieved from the finite element method model, with both methods showing good agreement. Additionally, spectrogram-based analyses were performed, focused on the acoustic waves phenomena related to a crack propagation process. It was confirmed that the proposed signal processing method, based on spectrogram analyses, can be applied for the detection of fatigue crack development in metal structures.

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Section: Introductionmentioning

confidence: 99%

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Mieloszyk

2021

Vibration

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“…The latter are gaining more ground lately as they are well suited for the hostile operational environment inherent to ocean-going vessels. 9 Also, accelerometers and pressure gages are located in specific locations on the hull, primarily to monitor ship motions and vibrations, as well as impact loads (e.g., bow slamming). 10 In any case, as this technology is still nascent in the maritime sector, available data are significantly limited.…”

Section: Introductionmentioning

confidence: 99%

Static strain-based identification of extensive damages in thin-walled structures

Silionis

Anyfantis

2021

Structural Health Monitoring

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Interest has been expressed during the past few years toward incorporating structural health monitoring (SHM) systems in ship hull structures for detecting damages that cause significant load-carrying reductions and subsequent load redistributions. The guiding principle of the damage identification strategy considered in this work is based upon measuring, through a limited number of sensors, the static strain redistributions caused by an extensive damage. The problem is tackled as a statistical pattern recognition one, and therefore, methods sourcing from machine learning (ML) are applied. The SHM strategy is both virtually and experimentally applied to a thin-walled prismatic geometry that represents an idealized hull form solely subjected to principal bending stresses (sagging/hogging). Damage modes causing extensive stress redistribution, are abstractly represented by a circular discontinuity. The damage identification problem is treated in a hierarchical order, initialized by damage detection and moving to an increasingly more localized prediction of the damage location. Training datasets for the ML tools are generated from numerical finite element simulations. Measurement uncertainty is propagated in the theoretical strains by information inferred from experimental data. Two different sensor architectures were assessed. An experimental programme is performed for testing the accuracy of the proposed damage identification strategy, yielding promising results and providing valuable insights.

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“…It was shown that the FBG rosette, under severe operating conditions, is an effective substitute for the rosettes incorporating standard electrical strain gauges. The work by [ 11 ] demonstrates the use of FBG rosettes for strain monitoring of structural elements of ships exposed to wind, waves, and other loads. The rosette parameters were optimized based on the results of numerical simulation by the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Reliability of Strain Measurements Made with the Fiber Bragg Grating Sensor Rosettes Embedded in a Polymer Composite Material

Матвеенко

Kosheleva

Serovaev

et al. 2021

Sensors

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The results of strain measuring experiments, with the help of rosettes consisting of fiber Bragg grating sensors (FBG) embedded at the manufacturing stage in a polymer composite material are considered in this paper. The samples were made by the direct pressing method from fiberglass prepregs. A cross-shaped sample was tested under loading conditions corresponding to a complex stress state. A variant of strain calculations based on experimental data is discussed. The calculations were performed under the assumption of a uniaxial stress state in an optical fiber embedded in the material. The obtained results provide a reasonable explanation of the absence in the conducted experiment of two peaks in the reflected optical spectrum, the presence of which follows from the known theoretical principles. The experimental result with two peaks in the reflected optical spectrum was obtained for the same sample under a different loading scheme. The proposed variant of the numerical model of the experiment and the results of numerical simulation made for FBG rosettes embedded in the material allowed to estimate error in the strain values calculated on the assumption of the uniaxial stress state in the optical fiber and in the presence of two peaks in the reflected optical spectrum.

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Application study on FBG sensor applied to hull structural health monitoring

Cited by 44 publications

References 11 publications

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Static strain-based identification of extensive damages in thin-walled structures

Analysis of Reliability of Strain Measurements Made with the Fiber Bragg Grating Sensor Rosettes Embedded in a Polymer Composite Material

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