三峡溢流坝左导墙流激振动有限元计算分析

FEM analysis on flow-induced vibration of TGP left traning wall

三峡工程溢流坝泄水时 ,泄洪水流将对导墙产生较强的水流脉动压力和激荡力作用 ,可能诱发结构振动 ,甚至导致工程事故。以左导墙为研究对象 ,在总结了水弹性模型流激振动试验和相应计算的基础上 ,水弹性振动模型试验实测的脉动压力成果 ,按水弹性相似律进行转化 ,采用逐步积分方法 ,对导墙模型结构和原型结构作流激振动响应分析比较 ,并对点面转换系数进行了探讨 。

The TGP spillway flow will produce strong fluctuating pressure and excitation force on the training wall and could cause the structure vibration,even bring about engineering accident.This paper takes the TGP left training wall as study object,on the base of summarization of flow-induced vibration experiment by the hydraulic elastic model and related computational analysis,experimental results of fluctuating pressure are transformed by hydraulic elastic similarity law,the response analyses for the model structure and prototype structure of the left traning wall with step-by-step integrating method are compared,the point-area transformation coefficient is discussed,and in the end,a comprehensive evaluation to the safety of the left training wall is put forward.