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Steel and Composite Structures
  Volume 51, Number 6, June 25 2024 , pages 713-727
DOI: https://doi.org/10.12989/scs.2024.51.6.713
 


A hybrid singular value decomposition and deep belief network approach to detect damages in plates
Jinshang Sun, Qizhe Lin, Hu Jiang and Jiawei Xiang

 
Abstract
    Damage detection in structures using the change of modal parameters (modal shapes and natural frequencies) has achieved satisfactory results. However, as modal shapes and natural frequencies alone may not provide enough information to accurately detect damages. Therefore, a hybrid singular value decomposition and deep belief network approach is developed to effectively identify damages in aluminum plate structures. Firstly, damage locations are determined using singular value decomposition (SVD) to reveal the singularities of measured displacement modal shapes. Secondly, using experimental modal analysis (EMA) to measure the natural frequencies of damaged aluminum plates as inputs, deep belief network (DBN) is employed to search damage severities from the damage evaluation database, which are calculated using finite element method (FEM). Both simulations and experimental investigations are performed to evaluate the performance of the presented hybrid method. Several damage cases in a simply supported aluminum plate show that the presented method is effective to identify multiple damages in aluminum plates with reasonable precision.
 
Key Words
    aluminum plate; damage detection method; deep belief network; finite element method; singular value decomposition
 
Address
Jinshang Sun, Qizhe Lin, Hu Jiang and Jiawei Xiang:College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, 325035, P.R. China
 

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