Fatigue life assessment with the use of spectral method for materials subjected to standardized wind loading spectrums

Fatigue life assessment for random loading can be divided into two groups, defined in time or frequency domain. In this paper we are within the range of calculations in the frequency domain. The paper deals with the problem of fatigue life assessment of materials subjected to wind loading spectrum. The paper analyses three types of standardized spectrums that is: Wisper, Wisperx and New Wisper. The spectrums have been processed to the use for fatigue life assessment algorithms. All the analyzed spectrums have a non zero mean stress characteristic and have a non Gaussian distribution. The proposed solution to the correction of these signals is widely explained. The paper deals with simulation based on fatigue material constants obtained from the literature. The results of assessment are compared to results obtained with the use of rainflow cycle counting method described in the time domain.