first-order second-moment method

基本解釋

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.
運用一次二階矩法計算主梁關鍵截面可靠度指標，評價主梁承載能力是否基于安全期內。
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.
一次二階矩方法是結構可靠度分析的基本方法．一次二階矩方法的計算精度依賴于驗算點附近功能函數的非線性程度。
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).
現有基本的結構可靠度計算方法可分為一次二階矩法、蒙特卡羅法和響應面法。