Abstract: Through grey prediction GM (1, 1) model calculation and Matlab software prediction, the prediction of ground motion response of 400 m³ storage tank is studied.First, the liquid height difference of the reservoir is set to 0.5 m, the total force, the base bending moment of the storage tank and the axial stress of tank wall under the horizontal earthquake are predicted under the different height of liquid storage.The prediction absolute error map is drawn, and the influence of earthquake intensity on the prediction error is obtained. Then, in order to further reduce the prediction error, the prediction effect is improved and the liquid height difference of the storage tank is adjusted to 1.0 m，reprediction the dynamic response of the storage tank. It is concluded that the interval of the high liquid difference data sequence of the storage tank increased from 0.5 m to 1.0 m. The relative error of the prediction results of the total horizontal seismic force and the base bending moment of the storage tank is reduced, after improvement, the prediction effect of bending moment and the axial stress of tank base are good.

Key words: Tank dynamic response, Matlab, Prediction

摘要： 通过灰色预测GM(1,1)模型测算和Matlab软件预测,对400 m³ 储罐进行地震动响应预测研究。首先设置储液高度液差为0.5 m,预测不同储液高度下各类储罐的水平地震作用力、储罐基底弯矩、储罐罐壁轴应力, 绘制预测绝对误差图,进行对比分析,得出地震烈度对预测误差的影响。为了进一步降低预测误差,改进预测效果, 调整储液高度液差为1.0 m,重新对储罐进行动响应预测,得出预测储罐储液高度液差数据序列间隔由0.5 m 增大为 1.0 m,储罐水平地震作用力、储罐基底弯矩预测结果相对误差降低,储罐基底弯矩、罐壁轴向应力改进预测后效果好。

关键词: 储罐动响应, Matlab, 预测