Numerical, experimental and fuzzy logic applications for investigation of crack location and crack depth estimation in a free-free aluminum beam

• Autorzy: Behera S. K. , Parhi D. R. , Das H. C.
• Języki publikacji: EN

Abstrakty

EN

A beam structure under natural vibration in presence of crack undergoes a sharp change in its dynamic characteristics. In the present study the changes in two important modal vibration parameters like mode shapes and natural frequencies have been extensively studied for crack diagnosis in presence and absence of crack. Numerical and experimental investigations have been carried out using an aluminium Free-Free beam structure with and without crack. The crack presence is indicative of a decrease in local flexibility at crack location and a variation in mode shapes and natural frequencies are noticed. These variations in modal parameters have been used as the tools for crack diagnosis. In the present paper, efforts are made to analyse the presence of a crack using the application of fuzzy logic methodology. Here relative natural frequencies preferably first three are derived from experimental and theoretical investigations are utilised as input data to the fuzzy controller with Gaussian membership functions to obtain crack position and crack depth as output data. The resulted output data from fuzzy logic and the result from corresponding experimental and numerical analysis have been compared.The deviation of result of fuzzy logic from numerical and experimental results have been found to be within a limit of 3%.

Słowa kluczowe

EN

crack; natural frequency; mode shapes; numerical; fuzzy

PL

pęknięcie; częstotliwość drgań własnych; kształty modów

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2018
• Tom: Vol. 29
• Strony: art. no. 2018019
• Opis fizyczny: Bibliogr. 51 poz., il. kolor., 1 fot., rys., wykr.

Twórcy

autor

Behera S. K.

• Department of Mechanical Engineering, Orissa Engineering College, Bhubaneswar, Odisha, India

autor

Parhi D. R.

• Department of Mechanical Engineering, National Institute of Technology, Rourkela, Odisha, India 769008

autor

Das H. C.

• Department of Mechanical Engineering, Institute of Technical Education and Research, Bhubaneswar, Odisha, India

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