中文摘要：

工作闸门是水利枢纽的咽喉,保证其安全可靠运行至关重要。针对五道水库泄洪洞工作闸门的流激振动问题,进行了泄洪洞1∶20水工模型试验,获取工作闸门的动水压力特性;通过1∶10工作闸门动特性试验,应用实验模态分析方法识别结构动特性;建立工作闸门三维有限元模型,进行结构振动响应计算分析。结果表明,工作闸门的低阶模态频率没有完全脱离动水激励的高能区域,可能产生较大流激振动;闸门振动响应在0.5相对开度时达到最大,应避免在此开度长时间运行。

英文摘要：

Working gate is the throat of the hydro-junction and it is critical important to keep it safety in the operation.In order to study the flow-induced vibration on working gate of the spillway tunnel in Wudao Reservoir,hydraulic model test with scale 1∶20 was conducted to obtain the dynamic pressure characteristics on the working gate.Experiment modal analysis method was employed to identify the structure dynamic characteristics through the 1∶10 working gate mode test.The 3D FEM model of the gate was built to simulate the vibration response of the structure.The research show the low order modal frequencies of the working gate were not fully breaking away from the high energy zone of the dynamic water which would induce severe vibration.The vibration response of the gate became the biggest when it was operating at 0.5 partial opening.