潜水器耐压结构可靠性计算及衡准

提出了一种潜艇及可潜器耐压结构可靠性分析计算方法。通过遗传算法直接搜索最大失效概率设计验算点的方法,来获得结构的可靠度值。开发出了实用计算程序。数值计算表明该方法有良好的通用性、收敛性和数值稳定性。分析讨论了各类随机变量变异系数对可靠性的影响。用与确定性设计计算规则所给出的安全性衡准相对比的方法,换算出可靠性分析中结构所对应的可靠性指标值,作为建立可靠性衡准的依据。

The Study of Calculation and Criterion Based on Reliability for Submarine Pressure Hulls

An analysis and calculation method of reliability of submarine cylindrical pressure hulls is presented in this paper.The method uses Genetic Algorithms to search design point of the most failure probability to get the value of reliability index.An applied computer program is developed,which has good astringency, stability and in common use.The influence of coefficient of variation of all kinds of random variables on reliability is analyzed and discussed.Meanwhile,the authors adopt the method compared with safety criterion given by deterministic design rules to calculate the reliability index of corresponding structures as the standards to establish the criterion of reliability.