表孔弧门结构动静多工况服役性能仿真分析

Dynamic and Static Multi-condition Service Performance of Radial Gate Structure Based on Simulation Analysis

大型水电站表孔弧门结构的安全性能关乎于整个枢纽工程的安全运行。以某水电站表孔弧门为例,建立了大型表孔弧门的三维仿真模型,基于仿真模拟分析了在静水工况不同条件下弧门的应力与变形分布,进一步建立了动水条件下的流固耦合模型,研究了动水工况下表孔弧门的稳态和瞬态安全特性,并探讨了在不均匀载荷条件下表孔弧门结构开启过程中安全性能劣化规律,最后通过现场试验验证了模型的准确性。结果表明,该大型表孔弧门结构在静水、动水条件下的应力均较大,易产生应力集中的危险点位于表孔弧门面板下部边缘位置处,但均在安全裕度内;双液压活塞杆的不均匀载荷会导致弧门结构安全性能劣化,过大的不均衡载荷甚至会引起弧门失效坍塌。

The safety performance of the large surface radial gates is related to the safe operation of the whole hub project.Based on a surface radial gate of a certain hydropower station,a 3D simulation model of the radial gate was established.The deformation and stress distribution of the radial gate under different conditions of static water were studied.Furthermore,the fluid-structure coupling model under dynamic water was established.The steady and transient safety characteristics of the radial gate under dynamic water was studied,and the safety performance deterioration rule of the radial gate structure under nonuniform loading was explored.Finally,the accuracy of the model was verified by field tests.The results show that the stress of the radial gate is large in both static and dynamic water,and the dangerous point of stress concentration is located at the lower edge of the surface plate of the surface radial gate,but all are within the safety margin.The nonuniform loading of the double hydraulic cylinder will lead to the deterioration of the safety performance of the radial gate structure,and the excessive nonuniform loading will even cause the failure and collapse of the radial gate.