Vibration Analysis of Faulty Beam using Fuzzy Logic Technique

Abstract

The method of detecting crack location and its intensity in beam structures by fuzzy logic techniques and using ALGOR for finite element analysis has been considered in this project. The fuzzy logic controller used here comprises of three input parameters and two output parameters. Gaussian and triangular member ship functions are used for the fuzzy controller. The input parameters to the fuzzy- Gaussian controller and fuzzy- triangular controller are relative deviation of first three natural frequencies. The output parameters of the fuzzy inference system are relative crack depth and relative crack location. At the beginning theoretical analyses have been outlined for cracked cantilever beam to calculate the vibration parameters such as natural frequencies. A set of boundary conditions are considered involving the effect of crack location. A series of fuzzy rules are derived from vibration parameters which are finally used for prediction of crack location and its intensity. The comparison is made between Gaussian and triangular membership functions by calculating deviation from expected values of crack depth and crack location. Then finite element analysis of cracked beam has been done using ALGOR software where input files have been given through designing software. The proposed approach has been verified by comparing with the results obtained from fuzzy logic technique and finite element analysis.

Available Versions of this Item

• Vibration Analysis of Faulty Beam using Fuzzy Logic Technique. (deposited 12 May 2009 14:15) [Currently Displayed]
  • Vibration Analysis of Faulty Beam using Fuzzy Logic Technique. (deposited 15 May 2009 15:16)