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首页> 外文期刊>Journal of hydraulic research >Pressure extrema in energy-dissipating structure using block maxima: case study
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Pressure extrema in energy-dissipating structure using block maxima: case study

机译:耗能结构中采用块最大值的压力极值:案例研究

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Knowledge of hydrodynamic processes is essential for engineers who assess the stability of energy dissipation structures undergoing extreme pressure fluctuations caused by turbulence during high discharge. Methods are in particular required to evaluate the frequencies of occurrence of extreme pressures. This work explores the use of the generalized extreme value (GEV) distribution to represent frequencies of instantaneous pressures recorded in a structure designed for energy dissipation by a hydraulic jump in a hydroelectric power station at Porto Colombia in central Brazil. The goodness of fit of the GEV distribution was evaluated using probability plots and the Kolmogorov-Smirnov test. The results indicate that it is appropriate for studying the maximum and minimum pressures for a range of discharges corresponding to Froude numbers between 3.88 and 6.42.
机译:对于评估在高放电期间由于湍流引起的极端压力波动的能量耗散结构的稳定性的工程师来说,流体动力学过程的知识至关重要。特别需要方法来评估极端压力的发生频率。这项工作探索了使用广义极值(GEV)分布来表示记录在结构中的瞬时压力频率,该结构设计用于通过巴西中部哥伦比亚的波尔图水电站的水力跃迁进行能量消散。使用概率图和Kolmogorov-Smirnov检验评估GEV分布的拟合优度。结果表明,适合研究与弗劳德数在3.88和6.42之间相对应的一系列排放量的最大和最小压力。

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