Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate

Mingyao Liu; Liang Wan; Zechao Wang; Liu Hong; Yongzhi Qu

doi:10.1109/PHM-Qingdao46334.2019.8943003

Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate

Mingyao Liu, Liang Wan, Zechao Wang, Liu Hong, Yongzhi Qu

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

The cantilever plate structure is widely used in wind tunnel nozzle segments. During the operation of the wind tunnel, the flexible steel plate will bear various complex loads such as shearing, bending and twisting, etc. The bolts of the plate are prone to loosen due to the fatigue damage. The methods based on the electromechanical impedance, sub-harmonic resonance and vision have been presented in the literature. However, the mentioned methods cannot detect the bolt looseness effectively in a harsh environment. To address this issue, we presented a novel method to detect the bolt looseness for the cascaded structures based on the operational strain estimated from Fiber Bragg Grating (FBG). In this work, an improved method of the operational modal analysis (OMA) presented in our previous work is employed. And then an enhanced Structural Damage Indicator (SDI) based on the operational strain is presented to detect and locate the loose bolts. Both the results from experiments and simulations showed that the SDI can detect and locate the loose bolts accurately.

Original language	English (US)
Title of host publication	2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019
Editors	Wei Guo, Steven Li, Qiang Miao
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728108612
DOIs	https://doi.org/10.1109/PHM-Qingdao46334.2019.8943003
State	Published - Oct 2019
Externally published	Yes
Event	10th Prognostics and System Health Management Conference, PHM-Qingdao 2019 - Qingdao, China Duration: Oct 25 2019 → Oct 27 2019

Publication series

Name	2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019

Conference

Conference	10th Prognostics and System Health Management Conference, PHM-Qingdao 2019
Country/Territory	China
City	Qingdao
Period	10/25/19 → 10/27/19

Bibliographical note

Funding Information:
The research is financially supported by the National Natural Science Foundation of China (NSFC), Grant no.51505353

Publisher Copyright:
© 2019 IEEE.

Keywords

fiber Bragg grating
loose bolt
strain mode
structural damage index

Access

10.1109/PHM-Qingdao46334.2019.8943003

OpenUrl availability

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Cite this

Liu, M., Wan, L., Wang, Z., Hong, L., & Qu, Y. (2019). Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate. In W. Guo, S. Li, & Q. Miao (Eds.), 2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019 Article 8943003 (2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PHM-Qingdao46334.2019.8943003

Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate. / Liu, Mingyao; Wan, Liang; Wang, Zechao et al.
2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019. ed. / Wei Guo; Steven Li; Qiang Miao. Institute of Electrical and Electronics Engineers Inc., 2019. 8943003 (2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Liu, M, Wan, L, Wang, Z, Hong, L & Qu, Y 2019, Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate. in W Guo, S Li & Q Miao (eds), 2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019., 8943003, 2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019, Institute of Electrical and Electronics Engineers Inc., 10th Prognostics and System Health Management Conference, PHM-Qingdao 2019, Qingdao, China, 10/25/19. https://doi.org/10.1109/PHM-Qingdao46334.2019.8943003

Liu M, Wan L, Wang Z, Hong L, Qu Y. Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate. In Guo W, Li S, Miao Q, editors, 2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019. Institute of Electrical and Electronics Engineers Inc. 2019. 8943003. (2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019). doi: 10.1109/PHM-Qingdao46334.2019.8943003

Liu, Mingyao ; Wan, Liang ; Wang, Zechao et al. / Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate. 2019 Prognostics and System Health Management Conference, PHAI-Qingdao 2019. editor / Wei Guo ; Steven Li ; Qiang Miao. Institute of Electrical and Electronics Engineers Inc., 2019. (2019 Prognostics and System Health Management Conference, PHM-Qingdao 2019).

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N2 - The cantilever plate structure is widely used in wind tunnel nozzle segments. During the operation of the wind tunnel, the flexible steel plate will bear various complex loads such as shearing, bending and twisting, etc. The bolts of the plate are prone to loosen due to the fatigue damage. The methods based on the electromechanical impedance, sub-harmonic resonance and vision have been presented in the literature. However, the mentioned methods cannot detect the bolt looseness effectively in a harsh environment. To address this issue, we presented a novel method to detect the bolt looseness for the cascaded structures based on the operational strain estimated from Fiber Bragg Grating (FBG). In this work, an improved method of the operational modal analysis (OMA) presented in our previous work is employed. And then an enhanced Structural Damage Indicator (SDI) based on the operational strain is presented to detect and locate the loose bolts. Both the results from experiments and simulations showed that the SDI can detect and locate the loose bolts accurately.

AB - The cantilever plate structure is widely used in wind tunnel nozzle segments. During the operation of the wind tunnel, the flexible steel plate will bear various complex loads such as shearing, bending and twisting, etc. The bolts of the plate are prone to loosen due to the fatigue damage. The methods based on the electromechanical impedance, sub-harmonic resonance and vision have been presented in the literature. However, the mentioned methods cannot detect the bolt looseness effectively in a harsh environment. To address this issue, we presented a novel method to detect the bolt looseness for the cascaded structures based on the operational strain estimated from Fiber Bragg Grating (FBG). In this work, an improved method of the operational modal analysis (OMA) presented in our previous work is employed. And then an enhanced Structural Damage Indicator (SDI) based on the operational strain is presented to detect and locate the loose bolts. Both the results from experiments and simulations showed that the SDI can detect and locate the loose bolts accurately.

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Looseness Detection Utilizing FBG Based Operational Modal Strain for a Bolted Cantilever Plate

Abstract

Publication series

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Bibliographical note

Keywords

Access

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