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以高坝洲水电站消力池导墙上点、面脉动壁压的同步试验资料为基础,通过随机分析对点、面脉动壁压强度与谱密度函数的变化进行了探讨,并用VITA法对点面脉动壁压的相干模式进行了识别,得到如下成果:作用于消力池导墙上的面脉动壁压强度最大值与上、下游水位之差有关,而点脉动壁压强度与其基本无关;在谱密度函数中,点脉动壁压存在f-1和f-7/3的频谱段,而面脉动壁压的f-7/3频谱段并不明显,且其优势频率略小于点脉动壁压的优势频率;所研究的水流脉动壁压与平顺水流情况下的脉动壁压时间相干模式颇为相似,且点脉动壁压的相干时间比面脉动壁压小.
Based on the synchronous experimental data of point wall and surface pulsating wall pressure on the guide wall of the pool in the Qiabazhou hydropower station, the change of the wall pressure intensity and the spectral density function of the point and surface pulsation were analyzed by stochastic analysis. The results showed that the maximum value of the fluctuating wall pressure acting on the guide wall of the stilling basin was related to the difference between the upstream and downstream water levels and the point ripple wall pressure had nothing to do with it. In the spectral density function, there are f-1 and f-7/3 spectral bands in the point-fluctuating wall pressure, while the f-7/3 spectral band in the surface-pulsating wall pressure is not obvious, and the dominant frequency is slightly smaller than the point- The dominant frequency of the fluctuating wall pressure is similar to that of the fluctuating wall pressure under the condition of smooth flow, and the coherent time of the point fluctuating wall pressure is smaller than that of the surface pulsating wall pressure.