消力塘透水底板脉动壁压幅值相似律研究

以底流消能情况下消力塘透水底板下表面脉动壁压为研究对象,设计了系列比尺(1∶1,1∶2,1∶4)模型试验,分析了透水底板脉动壁压强度、偏态系数、峰度系数以及概率密度函数沿程分布特征,并研究了系列比尺模型试验中脉动壁压幅值特性的相似律问题。结果表明,底流消能情况下消力塘透水底板脉动壁压幅值符合重力相似律。

Study on similarity law of fluctuating wall-pressure amplitude of pervious bottom slab of plunge pool

By taking the surface fluctuating wall-pressure underneath pervious bottom slab of plunge pool under the condition of energy dissipation by hydraulic jump as the study object， the model tests of a series of scales（1∶1， 1∶2， 1∶4）are designed， and then the intensity， deviation coefficient， coefficient of kurtosis and the on-way distribution feature of the probability density function of the fluctuating wall-pressure are analyzed， furthermore， the issue of the similarity law of the characteristics of the fluctuating wall-pressure in the model tests of a series of scales is studied as well. The result shows that the fluctuating wall-pressure amplitude of the pervious bottom slab of plunge pool under the condition of the energy dissipation by hydraulic jump accords with the gravity similarity law（Froude）.