Journal of Theoretical
and Applied Mechanics

39, 4, pp. 815-823, Warsaw 2001

Genetic algorithms in fatigue crack detection

Marek Krawczuk, Arkadiusz Żak, Wiesław Ostachowicz
This paper presents results on the identification of fatigue cracks in beams via genetic search technique and changes in natural frequencies. The location and size of the crack are determined by minimisation of an error function involving the difference between the calculated and "measured" natural frequencies. The simulation studies indicate that the changes in the natural frequencies and genetic algorithm allows one to estimate the fatigue crack parameters (location and size) very accurately and fast.
Keywords: fatigue crack detection; vibration methods; genetic algorithms