结构破坏概率预示技术

在宇航工程中，预示结构的破坏概率、计算结构的可靠性是型号设计中的重要任务。传统的结构设计和强度计算方法都是针对确定性结构和载荷环境参数的，无法直接考虑材料性能、结构几何参数的分散性，本文将随机摄动技术、传递函数理论和有限元程序结合在一起，提出了一种预示结构破坏概率、计算结构可靠度的途径。简单的实全表明，这种途径是走得通的。

A Technique to predict the probability of failure for a stochastic structure

To calculate the probability of failure for a structure is one of the most important task in Aerespace enginearing, It is difficulty for classical mechanics to analyse a structural system that possesses Uncertainties in its material and/or geometry properites under Ramdorn Loads. A method bosed on theory of transfer function and Finite element perturbation technique is presented in this paper. It can be used to predict the probability of failure for a stochastic structural system. Some simple examples is made to demonstrate the ability of the method.