机械结构分析的有限元方法

通过引入可靠度的置信区间和置信度的概念,可以把机械结构分析中的随机参数转化为置信区间下的区间数,从而可以运用普通的有限元程序对含有随机参数的工程结构利用区间算法进行强度分析,讨论了在一般算法的前提下,提出了利用区间算法结合力学知识可以简化计算量的方法,最后的实例表明该方法是可行的。

The Analysis of the Random-structure with a Finite Element Method

Using concepts of the confidence interval and degree of confidence, random parameters in an engineering structure can be transferred into the interval numbers. With the prints of the interval number, an engineering random structure problem can be studied he by using a genera finite element method program. In this paper, after a general interval calculating method used into a general finite element method is discussed, a simple calculation method which be combined with the concepts of the mechanics is presented. Finally, the examples show the methods efficiently.