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이성행,김하집,박영진,함형길,공보성,Lee, Seong-Haeng,Kim, Ha-Jip,Park, Young-Jin,Hahm, Hyung-Gil,Kong, Bo-Sung 한국농공학회 2011 한국농공학회논문집 Vol.53 No.3
A model test is carried out to investigate the vibration of truss type lift gate in the four major rivers project. The gate model scaled with the ratio of 1 : 25 is made of acryl panel dimensioned 1.6 m in width, 0.28 m in height in the concrete test flume. Firstly natural frequencies of the model gate are measured and the results are compared with the numerical results in order to verify the model. The amplitudes of the vibration are measured under the different gate opening and water level conditions. The results are analyzed to study the characteristics of the gate vibration according to the small gate opening, the large gate opening and the overflow conditions. These test results presents a basic data for the guide manuals of gate management and a design method to reduce the gate vibration of truss type lift gate. Finally, the vibration of truss type lift gate are assessed in comparison with those of formerly tainter gate.
2단식 수문을 활용한 수문상단 표층수 월류와 유동안정화 연구
이성명(Lee Sung-Myung),김철환(Kim Cheol-Hwan),최훈기(Choi Hoon-Ki),김원석(Kim Won-Seok) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
For the trapping water in reservoir to install water gate as of various type, we have studied results as of flow pattern without vortex and bubble at turbine inlet in the small hydraulic power-plant. In case of overflow conditions on the top crest of water gate, overflowing effect with test matrix is reviewed by phenomenon of surface wave using the flow test and numerical simulation. We ascertained that height of wave is lowed and vortex/bubble at turbine inlet is reduced as overflowing is larger.