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储罐基础的不均匀沉降是造成储罐结构破坏的主要原因之一,因此对储罐不均匀沉降的预测就显得格外重要[1]。灰色预测模型GM(1,1)只需要少量的样本数据就能达到较高的预测精度,在工程应用方面被广泛使用[2~3]。然而在GM(1,1)模型中,从离散形式到白化形式的转变,一直是导致灰色预测精度不高的首要原因,本文使用改进型DGM(1,1)对储罐不均匀沉降进行预测。实例模拟表明,与传统GM(1,1)模型相比,改进型灰色模型DGM(1,1)具有更高的预测精度,显示了该方法进行储罐不均匀沉降预测的的有效性。
Uneven settling of the tank foundation is one of the main reasons for the structural damage of the tank. Therefore, it is particularly important to forecast the uneven settlement of the tank [1]. The gray prediction model GM (1,1) can achieve high prediction accuracy with only a small amount of sample data and is widely used in engineering applications [2 ~ 3]. However, in the GM (1,1) model, the transition from the discrete form to the whitened form has been the primary reason for the poor gray prediction accuracy. In this paper, the improved DGM (1,1) is used to predict the uneven settlement of the tank . The simulation results show that the improved gray model DGM (1,1) has higher prediction accuracy than the traditional GM (1,1) model, and shows the effectiveness of this method in predicting the uneven settlement of the tank.