first-order second-moment method

基本解释

The first-order second-moment method is employed to calculate the reliability of girders, and to evaluate whether the carrying capacity is safe or not.
运用一次二阶矩法计算主梁关键截面可靠度指标，评价主梁承载能力是否基于安全期内。
The first-order second-moment method is fundamental in structural reliability analysis, its accuracy depends upon the nonlinear extent of performance functions around checking point.
一次二阶矩方法是结构可靠度分析的基本方法．一次二阶矩方法的计算精度依赖于验算点附近功能函数的非线性程度。
The present usually reliability analysis method for engineering structures are Monte Carlo Simulate (MCS), First-order Second-moment method (FOSM) and Reliability Surface Method (RSM).
现有基本的结构可靠度计算方法可分为一次二阶矩法、蒙特卡罗法和响应面法。