EDGE-LEAKAGE-INDUCED VIBRATIONS OF THE ENTRANCE PLATE GATE——NAUDASCHER’S MODEL

作     者：肖天铎 XIAO TIANDUO(Institute of Water Conservancy and Hydroelectric Power Research, Beijing)

作者机构：Institute of Water Conservancy and Hydroelectric Power Research Beijing 

出 版 物：《Science in China,Ser.A》 (中国科学A辑(英文版))

年 卷 期：1986年第9期

页      面：994-1008页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：NAUDASCHER’S MODEL EDGE-LEAKAGE-INDUCED VIBRATIONS OF THE ENTRANCE PLATE GATE 

摘      要：Naudascher has suggested a flow-induced vioration model for the entrance plate gate with edge leaks leading to a closed water tunnel. This paper, using the hydraulic principle and system analysis, accounts the turbulent leakage force behind the gate equivalent to the fluctuations of the velocity-squared head losses and obtains the criterion conditions of stability for the model. Example calculations are carried out for four cases: gate in translational or rotational vibrations and tunnel with or without a surge tank. The liability to vibration at small gate openings and its inevitability on the occasion of vertical edge leak are indicated. Characteristic roots are also computed for the four cases, giving frequencies and damping coefficients of the vibrations.