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随机载荷作用下结构疲劳损伤的累积
引用本文:朱位秋,雷鹰.随机载荷作用下结构疲劳损伤的累积[J].固体力学学报,1993,14(1):7-15.
作者姓名:朱位秋  雷鹰
作者单位:浙江大学,汕头大学 杭州 310027,汕头 515000
摘    要:本文提出了一种计算在随机载荷作用下具有随机疲劳强度的结构的累积疲劳损伤与疲劳寿命的概率密度函数及可靠性函数的方法.对在平稳窄带高斯随机应力作用下的金属与钢筋混凝土构件,给出了上述函数的解析表达式.数例计算表明,理论结果与数字模拟结果颇为吻合.

关 键 词:疲劳  损伤  疲劳寿命  随机载荷  结构

FATIGUE DAMAGE ACUMULATION OF STRUCTURES UNDER RANDOM LOADING
Zhu Weiqiu.FATIGUE DAMAGE ACUMULATION OF STRUCTURES UNDER RANDOM LOADING[J].Acta Mechnica Solida Sinica,1993,14(1):7-15.
Authors:Zhu Weiqiu
Abstract:A method for estimating the probability densities of cumulative fatigue damage and fatigue life andreliability function of structures with random fatigue strength under random loading is presented.The ana-lytical expressions for probability densities of cumulative fatigue damage and fatigue life and reliabi-lity function are given for metal and reinforced concrete components with constant fatigue strength subjectto stationary narrow-band Gaussian stress process with zero mean.The results obtained by using the pres-ent method for an example agree well with those from digital simulation.
Keywords:fatigue  damage  fatigue life  reliability  random loading  stochastic averaging  
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