Numerical Simulation Of Dynamic Characteristic And Flow-induced Vibration Of Radial Gate

Steel radial gate is a gate type widely applied in hydraulic structures，it has somany advantages such as：without gate grooves，less lifting force，better hydraulicconditions and so on. In recent years，with the continuous upsizing of inlandnavigation-power junction，the size of low head steel radial gate and the design loadincreased. Hydrodynamic hoist and local open drain flow is a basic ability of gaterequires in practice，but the practice shows，radial gate in the opening and closingprocess or partial opening of discharge，often accompanied with vibration，vibrationeven make the gate dynamic instability. Therefore，analysis for the large size arc steelgate dynamic and research on the vibration characteristics of partial discharge is verynecessary.This paper summarizes the types of damage of radial gate and gate failure causesare analyzed，expounds the theoretical basis of flow induced vibration of radial gate，the three main research method of gate vibration are analyzed and compared.Secondly，this paper uses the ADINA software，using potential flow elementestablished gate-water fluid-solid coupling finite element model，the different openingof the gate of fluid-solid coupling vibration characteristics were calculated，the gate ofthe frequencies and vibration，analyzed the effect of the gate opening，the flow and thedepth on gate vibration frequency and vibration mode，and laid the foundation for thefurther study of gate leakage flow vibration problems.Finally，RNG k-ε turbulence model was used in this paper to proceed anumerical simulation under the condition of fluid-solid coupling on the vibrationcharacteristics with the gate was opening discharge，gate in the vibration under thecondition of time-history curve was obtained，the deformation and stress analysis ofthe main components of gate panel of the gate，rails and supporting arms was made，offer the reference to the design and operation management of radial gate.