一次二阶矩可靠度方法及其软件

开发了利用一次二阶矩方法计算正态分布、对数正态分布、极值分布和截断正态分布随机变量非线性极限状态方程可靠度的软件,并利用相关系数考虑了机械产品随机变量相关的情况.在增加相应简单模块的基础上,可用于计算包含其它分布类型随机变量极限状态方程的可靠度.软件运行表明这种方法迭代格式简单,收敛快,可用于计算机械零件、结构和机构可靠度. 

First-Order Second-Moment Reliability Method and Its Software

The common software of the first order second moment reliability method is developed. It can be used to calculate the reliability of the non linear function with normal, log normal, extreme and truncated normal statistically dependent random variables. The calculation results show that this method is simple in iteration and converge fast. It can be used in practical engineering design, for example, the structure, mechanism and mechanical part design. This software is developed using block structure method, so it is convenient for further development. The random variables with the other kinds of distribution can be considered by developing the corespondent programs.