本文以响应信号的统计特征之一RMS应力为估计参量,推导出随机疲劳曲线,及失效总循环数N_F与失效时间t_F的关系,并列举了应用实例。 In this paper, the RMS stress, which is one of the statistical characteristics of the response signal, is taken as the estimated parameter, and the relationship between the total fatigue cycle number N_F and the failure time t_F is deduced, and the application examples are listed.