Fatigue damage estimation under random vibration load: analytical model and experimental validation

Determining the fatigue life of parts under periodic, sinusoidal vibration is a fairly straightforward process. However, vibrations are random in a wide range of applications. In these cases, instantaneous vibration amplitudes are not predictable. For computing the severity of the damage many methods are available in literature, but the estimation damage is just an approximation. In this research, a numerical model, together with experimental validation, are proposed. The purpose of this model is to offer an alternative way to estimate fatigue damage caused by random vibrations.