Dynamic response of panel dam of Anti-seepage reservoir basin considering Dam-reservoir water hydrodynamic interaction

Abstract Based on the fluid motion equation, the finite element equation of the dam-reservoir water coupling system was established to calculate the dynamic response between the compressible reservoir water and the face rockfill dam, the dynamic response was compared with the dynamic response calculated by the Westergaard added mass formula, and the compressible and incompressible calculation results of the reservoir water were discussed. The results show that the failure of the panel tensile stress to exceed the standard will affect the overall anti-seepage safety of the reservoir basin. Although the dynamic response calculated by the Westergaard formula has little effect on the absolute acceleration and maximum dynamic displacement, it underestimates the influence of hydrodynamic pressure, and the calculated static and dynamic superimposed tensile stress along the slope is smaller. Therefore, it is necessary to consider the dam-reservoir water hydrodynamic interaction when the face rockfill dam of the anti-seepage reservoir basin is subjected to seismic analysis. In addition, the hydrodynamic pressure distribution when the water body is compressible is similar to when the water body is incompressible and only increases in numbers.