深孔弧形闸门静动力特性及流激振动

Static and dynamic characteristics of high pressure radial gate and its flow-induced vibration

弧形闸门由于其启门力小、无门槽及运行操作方便等优点,在水工建筑物中得到广泛应用,但不少闸门由于结构设计、布置或运行操作不合理等原因,在运行中会发生强烈振动甚至结构破坏,影响闸门结构的运行安全,特别是高水头、有局部开启控泄要求的大跨度弧形闸门。通过水力学试验、三维有限元静动力分析和流激振动试验,系统研究了深孔弧形闸门的水力学特性、静动力特性、流激振动特性,揭示了闸门结构的流激振动共振现象,并针对分析过程中出现的应力、变形过大问题,提出了加强闸门结构强度和刚度的优化措施,确保其安全平稳运行。

The radial gates have been widely used in the hydraulic structures for their merits such as low lifting force,needless to have gate slot and convenient operation. However,due to unreasonable structural design,arrangement or operation,structural failure and strong vibration of the gates often occur in the operation process,which has impacts on the safety operation of the gate structure,especially for the large radial gate with high water head and partial opening. Through hydraulic experiments,three-dimension finite element analysis and flow-induced vibration tests,studies of the hydraulic characteristics,static and dynamic characteristics,dynamic stability and flow-induced vibration characteristics of high pressure radial gates have been carried out to reveal the dynamic stability properties and strong resonance phenomenon of the gate structure. Aiming at the existing problems of high stress and large deformation,the authors also puts forward the structure optimization solution to increase the strength and stiffness of the gate structure,so as ensure the safety operation of the gate.