正态应力和正态强度结构可靠性的经典精确限

Classical Exact Limits of Structural Reliability for Normal Stress and Normal Strength

结构可靠性的估计问题是机械可靠性的主要问题之一。强度和应力均为正态变量的结构模式是一种较常见的模式。研究这一模式结构可靠性的区间估计问题。提出了用正态分布变差系数的区间估计结果来处理此模式结构可靠性的区间估计的新方法,给出了正态强度和正态应力的分布参数均未知时,结构可靠性的具有简单表达式的经典精确置信下限,它是此模式结构可靠性的区间估计研究问题上取得的一项重要进展。

The estimation of structural reliability is one of main problems in mechanical reliability.The structural model whose strength and stress are all normal variables is known commonly.The interval estimation of structural reliability of this model is studied,a new method to deal with the interval estimation by using the variation coefficient of normal distribution is proposed,and a classical,precise confidence lower limit expression of structural reliability,when the parameters of the distribution for normal stress and strength are unknown,is given.It makes an important progress for the parameter estimation of this model.