乌东德水电站水工闸门动力安全评价

乌东德水电站泄洪洞工作闸门为弧型闸门，具有孔口尺寸大、水头高、流速大、局部开启运行的特点，研究闸门在流激振动下的动力特性具有重要意义。运用数值模型和物理模型相结合的方法进行了仿真模拟和试验研究，综合评估了闸门的流激振动安全性。结果表明：两种模型得到的7阶以内闸门自振频率较为接近，且振型相同，相互验证了彼此的可靠性；物理模型试验应力结果与数值计算结果较为接近，闸门支臂和横梁等主要构件的动静叠加应力不超过157 MPa，闸门下支臂与支铰连接部位腹板处测点应力较大，但未超过局部承压容许应力值。

Dynamic safety evaluation on hydraulic gate of Wudongde Hydropower Station

The gate of flood discharge tunnel in Wudongde Hydropower Station is an radial gate, which has the characteristics of large orifice size, high head, large flow velocity and partial opening operation. It is of great significance to study the dynamic characteristics of the gate under the flow-induced vibration. In this paper, the numerical model (FEM) and physical model were carried out to simulate and test the dynamic safety of the gate. The following conclusions were obtained: the natural vibration frequencies of the gate within 7th order obtained by the two models were relatively close, and the vibration modes were the same, which verified each other's reliability. The experimental stress results of the physical model were close to those numerical results. The dynamic and static superposition stress of the main members such as the gate support arm and the beam was not more than 157MPa, and the stress on the web plate at the joint of the lower support arm and the support hinge of the gate was large, but it did not exceed the local allowable stress value.