Frequency-domain fatigue analysis of wide-band stationary Gaussian processes using a trimodal spectral formulation

In this paper, a procedure for fatigue analysis of a general wide-band stationary Gaussian process is developed in the frequency domain using a trimodal spectral formulation, based on a generalization of the principle proposed by Jiao and Moan for predicting bimodal fatigue damage. The novel method approximates the rainflow cycles with large amplitudes as the sum of the envelopes of the process components. First, the method is derived and the …