网壳结构稳定性分析的改进随机缺陷法智能控制

以作者前期研究的网壳结构缺陷稳定分析的改进随机缺陷法为基础,将异常值检验、临界荷载分布规律检验、设计临界荷载的取值等与随机缺陷稳定计算程序相结合,并增加智能控制模块,实时监察临界荷载分布规律及其统计参数的变化。当计算样本容量已能够恒定反映临界荷载的分布规律时即可停止整个缺陷稳定分析过程,从而使随机缺陷稳定性分析的计算工作量尽量小。计算结果表明,程序智能控制的样本数能够恒定反映临界荷载的分布规律。改进随机缺陷法智能控制程序的开发不但节约了网壳结构随机缺陷稳定分析的样本数和计算时间,而且为计算样本数的选取提供了依据,从而可针对不同分析对象确定需要的最小样本数。

Intelligent Control of Advanced Stochastic Imperfections Method for Stability Analysis of Lattice Shells

Based on the advanced stochastic imperfections method,the program of stochastic imperfections stability analysis is combined with abnormal value examination,statistical regulation of critical loads,and selection of critical design load.And an intelligent control module is developed.The distribution and parameters of critical loads can be monitored in real time.When the calculation number is large enough to reflect the statistical regulation of critical loads invariably,the whole process is stopped instantly.Examples show that the calculation number selected by the intelligent control module can reflect the statistical regulation of critical loads invariably.The calculation number and time are greatly reduced and it provides the theoretical foundation for the selection of calculation number.It is achieved that the minimum calculation number is determined in accordance with different latticed shells.