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Abstract
Structural Health Monitoring (SHM) and impact monitoring of composite structures have become important research topics in the recent year. In this research, a non-destructive vibration-based damage detection method is formulated using Genetic Algorithm (GA) and compared with classical method. The robustness and reliability of the capability to locate and to estimate the severity of damage, based on changes in dynamic characteristics of a structure, is investigated. The objective function for the damage identification problem is established by using the residual force method (FRM). Numerical experiments using finite element analysis are performed on composite beams with different damage scenarios in order to clarify the validity of the developed technique. The comparison between estimated and real damage illustrates the efficiency of the algorithm in damage detection. The results show that the present approach is correct and efficient for detecting structural local damages in composite beam structures.
Highlights
The non-destructive testing evaluation and condition assessment of aging infrastructure and mechanical engineering have become important research topics and received much attention for structural damage detection
In case of using Genetic Algorithm (GA), the residual force method (FRM) is used as an objective function combined with finite element models
We conclude that the results show that GA algorithm is able to quantify damage in most scenarios using data of residual force method within the first few iterations with high accuracy
Summary
The non-destructive testing evaluation and condition assessment of aging infrastructure and mechanical engineering have become important research topics and received much attention for structural damage detection. Damage detection and localization in thin plates based on vibration analysis using BAT algorithm in beam like and complex structures by Khatir et al [7]. DAMAGE LOCALIZATION AND QUANTIFICATION OF COMPOSITE BEAM STRUCTURES USING RESIDUAL FORCE AND OPTIMIZATION. In references [12, 13], the authors used this concept for damage identification in a shear structure and a tapered and non homogeneous beam using all mode shapes that were considered in the objective function formulation. In reference [4], the authors presented a new approach of inverse damage detection and localization based on model reduction. The authors of reference [16] used residual modal force vectors for damage localization.
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