Title: Applying artificial neural network and wavelet analysis for multiple cracks identification in beams

Authors: Hossein Aminpour; Foad Nazari; Sara Baghalian

Addresses: Department of Mechanical Engineering, Shahid Chamran University, Golestan Ave., Ahvaz, 6135743337, Iran. ' Department of Mechanical Engineering, Young Researchers Club, Hamedan Branch, Islamic Azad University, Hamedan, 65138734, Iran. ' Department of Civil Engineering, Young Researchers Club, Hamedan Branch, Islamic Azad University, Hamedan, 65138734, Iran

Abstract: In this research, two methods for crack detection in structures are presented and compared. The considered structure is a cantilever beam with rectangular cross section. In order to find cracks, firstly, a new technique based on wavelet analysis and finite element method (FEM) is applied. The advantage of this technique is that the crack detection process is more clear and comfortable than previous works. Then the process of crack detection is performed using FEM and combination of two types of artificial neural network (ANN) including radial basis function (RBF) and back-error propagation (BEP) neural networks. For crack identification in the proposed method, firstly, a RBF neural network is used to detect the number of cracks of structure. Then a BEP neural network is trained to detect the locations of cracks. Training of neural networks is performed using obtained data from FEM. Finally obtained results from two methods are compared with each other.

Keywords: multiple cracks; crack detection; finite element method; FEM; artificial neural networks; ANNs; wavelet analysis; cantilever beams; crack identification.

DOI: 10.1504/IJVNV.2012.046173

International Journal of Vehicle Noise and Vibration, 2012 Vol.8 No.1, pp.51 - 59

Available online: 29 Mar 2012 *

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