Abstract
Spectral method is one of the most effective methods of fatigue life estimation. In this method fundamental parameters characterizing the load process are determined on the basis of Power Spectral Density (PSD) function. PSD function can be obtained in many ways. Several functions from parametric methods, nonparametric methods and subspace method from Matlab package were discussed in this paper in terms of their use for the determination of fatigue life. Finally, calculated fatigue life was determined using spectral method and cycle counting method and compared using probability distributions of amplitudes according to Dirlik and Miner rule for damage summation.
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