논문실적
| 경인항 서해배수문에 대한 유체유발진동 예측 |
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학술지명 한국강구조학회
저자 조용,김한일,이계복,김대근
발표일 2012-06-09
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Flow-induced vibration for the Yellow Sea water gate in Gyeong-in Ara Waterway has been predicted by 2-dimensional unsteady CFD simulation when sea water flows into the port in the river. The time step of 5×10-4 sec is used for the unsteady calculation, and the sampling data each time step makes the Nyquist frequency to be 1,000 Hz. For gate opening of 1.60 m, it is predicted that the averaged velocity at the gate passage is 2.28 m/s, and the flow velocity after the gate increases to 3.69 m/s due to the narrow flow passage. Flow separation at the under leading edge of the gate and the shear layer between inflow sea water and river water are supposed to be fundamental vibration factor. As the gate opening ratio increases, the predicted vibration frequency increases to 10.60 Hz which doesn't reach the natural frequency of the gate of 12.5～15.5 Hz. |
