Damage Detection of Irregular Plates and Regular Dams by Wavelet Transform Combined Adoptive Neuro Fuzzy InferenceSystem

This paper presents a technique for irregular plate and regular dam damage detection based on combinationof wavelet with adoptive neuro fuzzy inference system (ANFIS). Many damage detection methods needresponse of structures (such as the displacements, stresses or mode shapes) before and after damage, butthis method only requires response of structures after damage otherwise many damage detection methodsstudy regular plate but this method also studies irregular plate. First, the structure (irregular plate or regulardam) is modeled by using ANSYS software, the model is analyzed and structure’s responses with damageare obtained by finite element approach. Second, the responses at the finite element points with regulardistances are obtained by using ANFIS. The damage zone is represented as the elements with reducedelasticity modules. Then these responses of structures are analyzed with 2D wavelet transform. It is shownthat matrix detail coefficients of 2D wavelet transform can specified the damage zone of plates and regulardams by perturbation in the damaged area.

کلیدواژه ها:

Damage detection ، Wavelet ، Wavelet transform ، fuzzy