Numerical Simulation of Flow Induced Vibration of Hydraulic Steel Gate Based on LES
In view of the complexity of flow induced vibration mechanism of steel gate and the frequent occurrence of flow induced vibration of steel gate in engineering practice,taking two-dimensional flat steel gate as an example and based on ADINA finite element analysis software,the flow field finite element model and solid finite element model under different opening degrees were established respectively,the dynamic response law of hydraulic steel gate with different opening degrees was explored,and the difference of dynamic response of steel gate under one-way and two-way fluid structure coupling was clarified,then the mechanism of flow induced vibration of hydraulic steel gate was revealed.The results show that a)with the increase of opening degrees,the fluctuating pressure at different positions of the flow field is decreased gradually,and the frequency of vortex shedding near the steel gate is decreased gradually.b)For hydraulic steel gate,one-way fluid struc-ture coupling can be used instead of two-way fluid structure coupling.c)The mechanism of flow-induced vibration of hydraulic steel gate is that the vortex shedding frequency of the flow field around the steel gate is consistent with or close to the first-order natural vibration frequency of the steel gate structure,resulting in the resonance of the steel gate.
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