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为更好地分析大坝变形序列的波动特征,采用滑动平均拟合代替多项式拟合对多重分形消除趋势波动法进行修改,将修改后的多重分形消除趋势滑动平均算法用于某双曲拱坝的变形分析中。结果表明,该大坝变形具有多重分形特征,其多重分形强度与大坝各坝段运行机理有关,多重分形消除趋势滑动平均算法可从整体和局部上评价大坝的工作性态,目前大坝运行良好,整体处于粘弹性工作状态。研究成果进一步丰富了大坝变形监测的内容。
In order to analyze the fluctuation characteristics of dam deformation sequence better, the sliding average fitting is used instead of polynomial fitting to modify the trend of multifractal trend elimination. The modified multifractal trend elimination moving average algorithm is applied to a double curvature arch dam In the deformation analysis. The results show that the deformation of the dam has multifractal characteristics. The multifractal strength of the dam is related to the operating mechanism of each dam. The multifractal trend-moving average elimination algorithm can evaluate the dam’s working behavior both globally and locally. At present, Working well, the overall work in the viscoelastic state. The research results further enriched the content of dam deformation monitoring.