Damage Diagnosis of the Beam-Like Structures Using Recued Model Updating and Iterative Method

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Abstract

Nowadays, damage diagnosis of the engineering structures, applying vibration signal for early damage identifying during normal operation of the structure or after some disasters such as earthquake are very important from academic and technology viewpoints. Among different methods, proposed for damage diagnosis of the structures, the methods, based on FE model updating using modal analysis features are very important because of its practicability such that there are many researches in this field. Also because of node measurement limitations in real structures, model reduction is accompanied with damage detection methods. In addition for on-line applications of the mentioned methods for structural health monitoring with complex and intensive FE modeling, speed and accuracy increasing has attracted many researchers’ attentions. In this paper one of new model updating methods, which is lately proposed and proved to be accurate and fast, are applied for designing a damage diagnosis method. A beam, modeled with FE, has been considered with artificial damage on it is simulated in MATLAB for studying the proposed methods’ abilities and the noise effects on the method was studied exactly. Additionally, for studying the capability of the method in practice, the proposed method was applied on laboratory beam and the results were studied.

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References

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 2 - Serial Number 2
July and August 2015
Pages 83-97

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