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Deflection Estimation of Truss Structures Using Inverse Finite Element Method

It is well recognized that strain and deflection data are important indexes to judge the safety of truss structures. Specifically, the shape sensing technology can estimate the deformation of a structure by exploiting the discrete strain data without considering the material property conditions. To...

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Detalles Bibliográficos
Autores principales: Zhang, Zhaobo, Zheng, Shuai, Li, Hongnan, Ren, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921316/
https://www.ncbi.nlm.nih.gov/pubmed/36772753
http://dx.doi.org/10.3390/s23031716
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author Zhang, Zhaobo
Zheng, Shuai
Li, Hongnan
Ren, Liang
author_facet Zhang, Zhaobo
Zheng, Shuai
Li, Hongnan
Ren, Liang
author_sort Zhang, Zhaobo
collection PubMed
description It is well recognized that strain and deflection data are important indexes to judge the safety of truss structures. Specifically, the shape sensing technology can estimate the deformation of a structure by exploiting the discrete strain data without considering the material property conditions. To fill the gap in which most of the methods in SHM (structural health monitoring) cannot be directly used to predict the displacement field, this paper proposed a novel inverse finite element method (iFEM) algorithm based on the equivalent stiffness theory. A deflection sensor is fabricated to focus on predicting the distributed deflection variation of the truss structure. The performance of the deflection sensor was evaluated by a calibration test and a stability test. Finally, it was applied to distributed deflection monitoring in the testing of truss structures. Results of all tests verify that the deflection sensor based on the i-FEM algorithm can predict the distributed deflection variation of the truss structure accurately, in real time, and dynamically.
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spelling pubmed-99213162023-02-12 Deflection Estimation of Truss Structures Using Inverse Finite Element Method Zhang, Zhaobo Zheng, Shuai Li, Hongnan Ren, Liang Sensors (Basel) Article It is well recognized that strain and deflection data are important indexes to judge the safety of truss structures. Specifically, the shape sensing technology can estimate the deformation of a structure by exploiting the discrete strain data without considering the material property conditions. To fill the gap in which most of the methods in SHM (structural health monitoring) cannot be directly used to predict the displacement field, this paper proposed a novel inverse finite element method (iFEM) algorithm based on the equivalent stiffness theory. A deflection sensor is fabricated to focus on predicting the distributed deflection variation of the truss structure. The performance of the deflection sensor was evaluated by a calibration test and a stability test. Finally, it was applied to distributed deflection monitoring in the testing of truss structures. Results of all tests verify that the deflection sensor based on the i-FEM algorithm can predict the distributed deflection variation of the truss structure accurately, in real time, and dynamically. MDPI 2023-02-03 /pmc/articles/PMC9921316/ /pubmed/36772753 http://dx.doi.org/10.3390/s23031716 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Zhaobo
Zheng, Shuai
Li, Hongnan
Ren, Liang
Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title_full Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title_fullStr Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title_full_unstemmed Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title_short Deflection Estimation of Truss Structures Using Inverse Finite Element Method
title_sort deflection estimation of truss structures using inverse finite element method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921316/
https://www.ncbi.nlm.nih.gov/pubmed/36772753
http://dx.doi.org/10.3390/s23031716
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AT zhengshuai deflectionestimationoftrussstructuresusinginversefiniteelementmethod
AT lihongnan deflectionestimationoftrussstructuresusinginversefiniteelementmethod
AT renliang deflectionestimationoftrussstructuresusinginversefiniteelementmethod