Numerical multiple statistic analysis method to study the effect of random imperfections on the stability of space structures

摘要

As various imperfections have considerable effect on the stability of space structures, the numerical multiple statistic analysis method is adopted in this article to make the distribution inspection and analysis of the buckling load of the calculation model on assuming that the imperfections are in random normal distribution. Based on this result, the "method of imperfection effect function" and "imperfection sensitivity index" concerning the effect of dimensionless random imperfections on the buckling load of structures are proposed, and applied to some examples. The results of research show that these methods are scientific, convenient and practical.