船体梁静水弯矩的统计分析

由装载状态决定的船体梁静水弯矩为－随机变量，其统计特征可利用随机模拟原理予以探讨，即按随机取样方法组成多种装载方案，用综合静力程序计算出相应的弯矩和吃水，再由计算结果确定其统计特征值．分析表明，此弯矩随装载的变化近似于正态分布律，并具有与船体中剖面模数或钢材屈服极限同样显著的变异系数。

Statistical Analysis of Still Water Bending Moment for Ship Hull Girder

The still water bending moment conditioned by loading condition is thc random variable, and its statistical characteristics can be studied by means of stochastic modelling. First, the multiple loading conditions are constru- cted by the principle of random sampling. Then, the corresponding SWBM and draughts are calculated using the comprehensive hydrostatics program. Finally, the statistical characteristic values can be found out from the above results. The analysis shows that the change of SWBM is close to the normal distribution, and its variation is as obvious as the variation of hull section modulus or steel yield.