高水头大尺寸闸门流激振动原型观测研究

Study of Flow-induced Vibration for the High-head and Large Dimension Gate

本文介绍天生桥一级电站放空洞工作闸门流激振动原型观测成果 ,首先应用实验模态分析技术对工作闸门的结构动力特性进行了仔细试验研究 ,获得了完整的结构模态信息。此外 ,考察了作用于闸门结构的脉动压力特征 ;研究了闸门结构在高速水流作用下的振动加速度、动位移及动应力等物理量的数字特征和谱特征。最后对闸门结构进行了动力可靠性分析。

In this paper study findings of on gate flow\|induced vibration of the emptying culvert in Tishengqiao power station are introduced.At first gate structure's dynamic characteristics are investigated carefully using the experimental model analysis technique,and entire structure modal information are obtained.In addition,flow pulsating pressure properties acted on the gate are investigated.Various physical values including vibration acceleration,dynamic displacement and dynamic stress,which are caused by high velocity flow,are studied;Finally gate structure's dynamic reliability is analyzed and safety operation principals are proposed.\;