大跨度对拉式浮体闸门流激振动特性研究——以南水北调中线一期引江济汉工程对拉式闸门为例

Research on flow-induced vibration of large-span floating gate of counter-pulling

为研究大型对拉式水工钢闸门的静动力特性及流激振动响应特性,以南水北调中线一期引江济汉工程拾桥河枢纽为依托,采用三维有限元方法对闸门结构进行静动力分析,并通过水弹性物理模型试验监测成果,验证结构分析的合理性以及闸门在不同运行工况下的振动特性,获得了作用于闸门结构的水流脉动压力荷载,取得了闸门结构在流固耦合条件下的固有振动模态参数,揭示了闸门结构在不同运行工况下的振动加速度、动位移及动应力响应特性。研究成果对工程今后的调度运行以及同类型工程建设具有参考意义。

For studying the static and dynamic characteristics under flow - induced excitation of large - span floating gate of counter - pulling, 3 D FEM was applied to carry out a structural analysis for the gate of Shiqiaohe Hydro - complex, a water diver- sion project from Yangtze River to Hanjiang River of the South - to - North Water Diversion. The numerical simulation result was verified by the hydroelasticity model test, and the vibration features such as flow fluctuating pressure, vibration mode under fluid -solid coupling action, vibration acceleration, dynamic displacement as well as stress of the gate in different operation cases were measured. The results have valuable meanings for future operation of the ~roiect and construction of other similar nroieets.