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Positive and Counter-analysis on Flow-induced Vibration of Radial Gate and Its Structural Optimization

Author: ShangXianFeng
Tutor: PengXinMin
School: Tianjin University
Course: Water Resources and Hydropower Engineering
Keywords: Radial gate Model test Dimensional finite element Flow-induced vibration Modal superposition method Optimization
CLC: TV663.2
Type: Master's thesis
Year: 2007
Downloads: 111
Quote: 1
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Abstract


Because there is no door groove radial gate opening and closing force is small and convenient operation and running characteristics, are widely used in water conservancy projects . With the development of dam construction , curved continuously improve working head gate , the gate size is also increasing day by day . When the gate is closed flap when the gates are generally designed to meet the static requirements, but the gate is partially open state running water moving under the action of strong vibrations occur. Noise and vibration to bring insecurity , and even cause dynamic instability gates , bringing serious losses. The safe operation of hydraulic gate and the normal work of the entire water conservancy is essential , and thus carry out the hydraulic radial gate structure and dynamic characteristics of great practical significance. In this paper, Xinjiang Kaidu Chahanwusu hydropower project that actually works , its dynamic characteristics of radial gate as well as its optimization of experimental research and numerical calculation . The main contents are as follows : ( a ) elastic model simulations based on the principle of water required to produce radial gate water elastic model , convection induced vibration analysis of test results . ( 2 ) Application of ANSYS software , the establishment of the radial gate dimensional finite element numerical model and dynamic analysis was carried out , given the natural frequencies of radial gate , and further analysis of the fluid-structure interaction effects on self- characteristics of the vibration , while the use of experimentally obtained hydrodynamic flow-induced vibration loads its numerical calculation , and its dynamic security analysis . ( 3 ) The modal superposition method is applied to flow-induced vibration of radial gate back analysis , hydrodynamic loads in unknown circumstances , may be a small amount of dynamic displacement measurement points measured value feedback analysis of the entire structure of hydrodynamic loads in the dynamic displacement and dynamic stress field . ( 4 ) the use of MATLAB optimization toolbox , the structure optimization design theory is applied radial gate structure optimization design and consider the structure of the static and dynamic constraint optimization , and achieved satisfactory structure size form .

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Sluice > Gate > Radial gate
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