疲劳寿命, 灰色系统理论, 灰色模型, 疲劳应力

Considering the uncertainty factors of the fatigue life, the grey system theory was used to predict the fatigue life. A new algorithm for predicting the fatigue life based on GM (1, 1) model and non-linear grey model Verhulst was proposed. The results of analyzing and calculating experimental data validate that the prediction error which is based on the traditional Miner method is 61.4%, and the prediction error which is based on the linear GM (1, 1) model is 24.1%, and the prediction error which is based on the non-linear grey Verhulst model is decreased to 17.5%. The prediction which is based on the grey model is safe. Therefore, the analysis of the examples indicates that using grey forecasting to predict the fatigue life has good forecasting accuracy and excellent applicability.