Abstract
It is difficult to get a theoretic answer to the water flow load features of high dam flood discharge. Through direct measurement of water flow load features by arranging a surface pressure cell, the complicated point-surface conversion was avoided, and the shock load and surge load features were obtained. For the dam body outlet wall pressure, isolated the fluctuating load applied to the plunge pool floor and the downstream dam surface, the impact of the fluctuating load to the arch dam dynamic response at the flood discharge flow outlet was obtained, and then the equivalent fluctuating load on each discharge flow outlet was obtained by using flow-induced vibration back analysis. The test shows that the energy of the shock load and the surge load mainly centers in a frequency range between 0~1Hz, the shock load is about 2.5-6 times that of the surge load, and the surge load is about 4 times that of the outlet wall pressure.
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