In view of the deficiency of traditional non-equidistance GM (1,1)model,this paper ananlyzed the fundamental of the traditional model and the distinction between the fundamental of the traditional model and winterization equation. And the improved pattern of accumulative sequence was set up,applying to the prediction of dam settlement. Examples show that the improved model has higher precision,which can be applied to the actual project.%针对传统非等间距GM(1,1)模型的不足,本文分析了传统非等间距GM(1,1)模型的基本原理,分析了传统非等间距GM (1,1)模型与白化方程之间的差异,提出了改进累加序列的方式来优化非等间距GM(1,1)模型,并建立了一种新的累加方式并应用于某大坝沉降。分析了本文中的非等间距GM(1,1)模型与传统非等间距GM(1,1)模型之间的差异。实例表明了改进非等间距GM (1,1)模型精度较高,更适合于工程实例。
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