Numerical Simulation of Emersed Radial Gate Based on Fluid-Solid Coupling by Forward and Anti-Analysis
For the issue of flow-induced vibration of spillway emersed radial gates under partially opening conditions,a fluid structure cou-pling transfer mathematical model for gates and spillway flow was constructed by using Computational Fluid Dynamics(CFD)software Fluent and Computational Structural Dynamics(CSD)software Mechanical APDL.Calculated and analyzed the vibration characteristics of the gate during discharge,developed a gate flow induced vibration back analysis program based on the principle of modal superposition,and achieved back analysis of the dynamic response results of the gate flow induced vibration.Taking the exposed arch gate of a certain project in Wujiang as an example for forward and backward analysis,the results indicate that the fluctuating pressure on the gate panel obtained from the Large Eddy Simulation(LES)turbulent model exhibits characteristics of low-frequency,narrow-band,and approximately gaussian distribution.The structural dynamic field of the gate is calculated by combining modal coordinates,vibration mode vectors,and stress vectors.The results of the back analysis of the dynamic displacement field and dynamic stress field are basically consistent with the results of the full method forward analysis,demonstrating the rationality of the back analysis method and the applicability of the program.
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