通过引入可靠度的置信区间和置信度的概念，可以把结构分析中的随机参数转化为置信区间下的区间数。

Using concepts of the confidence interval and degree of confidence, random parameters in an engineering structure can be transferred into the interval Numbers.

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并且由于区间分析方法不涉及概率的概念，可在一定程度上克服概率可靠性所存在的缺陷。

And because probabilistic concept is not required, it bypasses some of the drawbacks of the traditional probabilistic reliability method.

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