混凝土重力坝水平位移波动多重分形分析

Multifractal Analysis on Horizontal Displacement Fluctuation of Concrete Gravity Dam

文章通过多重分形分析揭示了混凝土重力坝水平位移与环境量(如水位、温度)之间的复杂关系,使用了优化的多重分形去趋势相关性分析法和多重分形非对称去趋势相关性分析法进行分析,并运用多尺度滑动时间窗模型来处理实测数据。经实例应用分析发现,水平位移在不同趋势下与环境量之间存在明显的多重分形特征,并呈现出一定的非对称性,具体分析表明,水位变化对水平位移的影响更为显著,而温度变化的影响相对较弱,在环境量的影响下,混凝土重力坝水平位移整体性态良好,水位变化对位移多重分形特征的影响更为显著。

The complex relationship between the horizontal displacement of concrete gravity dam and environmental factors(such as water level and temperature)is revealed by multifractal analysis.The optimized multifractal detrended correlation analysis method and multifractal asymmetric detrended correlation analysis method are used for analysis,and the multi-scale sliding time window model is used to process the measured data.Through application analysis of the example,it is found that there are obvious multifractal characteristics between horizontal displacement and environmental factors under different trends,showing a certain degree of asymmetry.The specific analysis shows that the influence of water level change on horizontal displacement is more significant,while the influence of temperature change is relatively weak.Under the influence of environmental factors,the horizontal displacement of concrete gravity dam is in good condition,and the influence of water level change on the multifractal characteristics of displacement is more signifi cant.