立式一体化泵闸安全性研究及结构优化

Safety and Optimization of Vertical Pump Gate

通过三维有限元数值模拟、水动力特性及流激振动试验,研究了立式表孔一体化泵闸结构在不同工作条件下的静动力特性、水动力特性和流激振动特性,采用Hilbert⁃Huang变换对随机数据进行分析,分析了泵闸装置抽水过程出现较大振动量的机理。在此基础上,对泵闸结构体型进行了抗振优化设计,加强了部件间的联结性和整体刚度。研究结果表明,该优化方案有效控制了结构振动,抗振优化效果显著,为同类工程设计提供了参考依据。

The pump gate is a new type of water environment management equipment with compact device and novel structure.However,as this equipment is a combination of hydraulic plate and axial-flow pump,the weak boundary constraint and complex flow are easy to induce the vibration of the pump gate.Therefore it is neces⁃sary to carry out systematic research on the hydraulics and power safety of the pump gate before widespread ap⁃plication.In this study,the hydrostatic properties,hydrodynamic and flow-excited vibration characteristics of the vertical pump gate are studied systematically.It is conducted when the equipment under different operating conditions.The research methodology includes numerical simulation,hydrodynamic and hydroelastic vibration experiments.As a result,the problem of large vibration is revealed when the pump gate is operating.The Hil⁃bert-Huang transformation method is used to analyze the data.On the basis of this,the modified and optimized design of the pump gate is carried out.The achievement indicates that the connection between components should be enhanced.After a great deal of effort,the final optimization scheme effectively controls the structural vibration and the optimization effect is significant,which provided a great reference for the design of similar proj⁃ects.