Research On The Dynamic Characteristic Of Radial Steel Gates By FEM And Model Test

Radial gates are widely used in hydraulic buildings, but some safety and stability problems exist in its application because of the complexity of structures and working condition. So the dynamic characteristic of radial gates is an important task in hydraulic structure engineering, and it is an important embranchment in structure engineering. It is of great practical value and significance to study the dynamic characteristic of radial gates.Based on these problems, and with the project of certain radial gate researched by Nanjing Hydraulic Research Institute as its background in engineering practice, the dynamic characteristic of radial gates is studied by means of both experimental and numerical methods.Using the hydro-power model, the date of fluctuating pressure in radial gates is obtained and the characteristic of hydrodynamic pressure in radial gates is studied and some conclusions are made.By using hydro-elastic model, the autooscillation characteristic and dynamic response of the radial gates in air are studied.With the software ANSYS, the FEM model for certain radial gate is established, and the autooscillation frequencies are calculated. The gate's static circumstance is studied and the results are compared with that of the model test, which proves the reliability of FEM. The nature frequencies of the radial gate in the water, as well as in the air, are calculated, the model is further analyzed, and the influences by the boundary conditions are discussed.Finally, analyzed autooscillation frequencies, some suggestions are presented for the optimum design for certain radial gate. The branches are connected close. With the software ANSYS, the autooscillation frequencies of the optimum design are calculated. The optimum performances are proved.