first order second moment

基本解释

A first order second moment formulation for systems fatigue reliability assessment of offshore structures is presented.
本文提出了海洋平台结构系统疲劳可靠性分析的一阶二次矩方法。
Based on reliability theory, the first order second moment method ( JC method) is adopted to analyze and compute the fatigue reliability.
基于可靠度理论，本文采用一次二阶矩法（JC法）对疲劳裂纹扩展可靠性进行计算。
The parameters of the model are fuzzily processed and the fuzzy risk can be evaluated by using the modified first order second moment method.
通过对模型中的参数进行模糊化处理，用改进一次二阶矩法计算了地下水过量开采的模糊风险率。