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Damage detection in Timoshenko beam structures by multilayer perceptron and radial basis function networks

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Abstract

This study investigates the efficiency of artificial neural networks (ANNs) in health monitoring of pristine and damaged beam-like structures. Beam modeling is based on Timoshenko theory. Two commonly used network models, multilayer perceptron (MLP) and radial basis neural network (RBNN), are used. Beam material and geometrical properties, beam end conditions and dynamically obtained data are used as input to the neural networks. The combinations of these parameters yield umpteenth input data. Therefore, to examine the effectiveness of ANNs, the frequency of intact beams is first tried to be determined by the network models, given the material and geometrical characteristics of beam elements and support conditions. The methodology to compute the vibrational data utilized in training the networks is provided. Showing the robustness of network models, the second stage of the study is carried out. At this stage, the crack parameters (e.g. the location and severity of crack) are estimated by the ANNs using the beam properties, beam end conditions and vibrational data, which consist of natural frequencies and mode shape rotation values. Despite the multiplexed input data, no data reduction schemes or multistage computations are executed in training and validation of neural network models. As a result of analysis runs, the optimal MLP and RBNN models are determined. Comparison of these models shows that the optimal RBNN algorithm performs better. The effectiveness of optimal ANN models in the presence of noise is also presented. As a conclusion, the trained network can be used as a diagnosis method in structural health monitoring of beam-like structures.

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Authors and Affiliations

  1. Department of Civil Engineering, Erciyes University, 38039, Kayseri, Turkey

    Kamil Aydin

  2. Department of Civil Engineering, Canik Basari University, Ilkadim, Samsun, Turkey

    Ozgur Kisi

Authors
  1. Kamil Aydin
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  2. Ozgur Kisi
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Correspondence to Kamil Aydin.

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Aydin, K., Kisi, O. Damage detection in Timoshenko beam structures by multilayer perceptron and radial basis function networks. Neural Comput & Applic 24, 583–597 (2014). https://doi.org/10.1007/s00521-012-1270-1

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  • DOI: https://doi.org/10.1007/s00521-012-1270-1

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