Study On Fluid - Structure Coupling Vibration Characteristics Of Planar Gate Based On Point Source (sink) Additional Mass Method

The plane gate is the gate which was one of the earliest and applied most widely in the water conservancy and Hydropower engineering. There are many safety and stability problems when the flat gate in the complex engineering conditions in the engineering application, because of its structural problems. The gate itself has a natural, in the process of opening and closing or partially open, there often have a more intense vibration because of the fluid solid coupling effect between the gate and the water, which may cause the vibration of the gate damage severe vibration. Therefore, no matter the plane gate structure of the experimental research of self vibration characteristics, and the influence of fluid solid coupling effect on the vibration characteristics of numerical analysis, both have very important engineering value and theory significance.In the practical engineering application, generally of solid fluid coupling mechanics model was simplified, there make some necessary assumptions, so that the fluid in the structure with added mass form of expression. In this paper, the vibration of the use of space, point source (sink) calculation of added mass flow induced vibration and three-dimensional structure of the fundamental solution of dipole are derived, derived the plane gate in the hydrostatic because the formulas for calculating the additional quality vibration induced by the. Multi field coupling and by the finite element analysis software ANSYS own analysis module of the calculation formula of the engineering rationality and applicability is verified.Establishment of plane gate model through the finite element analysis software ANSYS, the vibration characteristics of the flat gate. Then the added mass formula of plane gate in static water through the calculation of added mass, and calculated the plane gate in flow solid coupling under the action of vibration characteristics. At the same time the plane gate off state without considering the lateral constraint anhydrous, without considering the water, considering the lateral constraint anhydrous, considering lateral restraint water confinement,and when the plane gate is opening for the vibration characteristics of0.1,0.2,0.3,0.5,0.7,0.9. Comparative analysis of the vibration characteristics of the plane gate vibration characteristics and plane gate in static water full closed, and get the effect of plane gate in hydrostatic fluid solid coupling on its vibration characteristics. Summarizes the gate opening effect on the vibration characteristics of the plane gate, by the comparative analysis of the plane gate for the vibration characteristics of0.1,0.2,0.3,0.5,0.7,0.9in the opening.