摘要
首先介绍二种常用的疲劳可靠性分析模式,在视载荷与抗力为随机过程,视材料常数n和C为随机变量的基础上,对动态疲劳可靠性分析模型进行研究,建立动态疲劳可靠性分析方法。通过对Paris模型的分析,得到n和C的关系,试验结果的数据分析表明n和C分别符合正态分布及对数正态分布。借助二个实例,验证该方法的有效性,可作为工程机械金属结构疲劳可靠性检测评估的一种方法。
Two models of fatigue reliability analysis firsdy were introduced, after load and resistance were considered as stochastic processes and the material constants n and C as stochastic variables, the dynamic fatigue reliability analysis model was studied. A dynamic fatigue reliability analysis method was established. Through the Paris model a relationship between n and C was obtained. The experiment results of fatigue crack growth rate data indicate that both n and lg C are fit for a normal distribution. It indicates that the method is effective, two examples on this was available, which can be used in the evaluation of fatigue reliability of engineering machine metal structure.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2007年第3期478-482,共5页
Journal of Mechanical Strength
基金
交通部重点科技计划项目(5-06-02-26)
湖北省科委科技攻关项目(992P0117)的支持~~
