Theoretical analysis and simulation calculation of hydrodynamic pressure pulsation effect and flow induced vibration response of radial gate structure

To explore the characteristics of stochastic fluctuant water pressure acted on the surface of large radial gate and the flow-induced vibration response of the whole radial gate structure, taking a large-scale radial gate as prototype, the finite element calculation model structure of the radial gate was established to discuss the hydrodynamic pressure acting on the gate leaf with different opening, to study the dynamic pressure time curves and obtain the flow-induced vibration response by imposing hydrodynamic pressure as dynamic load. Take 10% opening of the radial gate, the results show that the hydrodynamic pressure distributed on the arc surface of the radial gate changes with the flow conditions, and the maximum pressure appears at the center of the lower edge of the gate leaf. The time history curve of fluctuating water pressure at a point can be used as the dynamic load for the flow-induced vibration analysis. The flow-induced vibration responses at the monitoring point of the radial gate structure have periodic changes in the X, Y, Z directions. The finite element simulation results are in good agreement with the theoretical calculation results, which can provide references for hydrodynamic pressure testing and flow-induced vibration response calculations.