白鹤滩水电站泄洪洞出口挑流鼻坎三维有限元静动力分析  

Three-dimensional Finite Element Static and Dynamic Analysis of Spillway Tunnel Outlet of Baihetan Hydropower Station

作　　者：都辉 王建新 陶俊佳 李倩 Du Hui;Wang Jianxin;Tao Junjia;Li Qian(Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《陕西水利》2020年第11期19-22,共4页Shaanxi Water Resources

摘　　要：白鹤滩水电站泄洪洞流速高、泄量大,出口流速达到45 m/s,设置挑流鼻坎进行挑流消能,可有效消除过坝洪水能量。挑流鼻坎结构体形复杂,过水流速快,常因体形不当、受力不均等因素引起破坏。采用大型三维有限元程序ANSYS对白鹤滩泄洪洞出口挑流鼻坎进行静动力计算,分析挑流鼻坎各个部位的位移和应力情况,并对不同边墙高度的鼻坎体型进行对比分析,确定了可能引起结构破坏的最不利位置,并给出合理的结论与工程措施建议。The flood discharge tunnel of Baihetan Hydropower Station has a high flow velocity and a large discharge volume,and the outlet velocity reaches 45 m/s.The spur nose sill is set up for the energy dissipation of the flow,which can effectively eliminate the flood energy of the dam.The structure of the nose sill is complicated,and the water flow rate is fast.It is often damaged due to improper body shape and uneven force.The large-scale three-dimensional finite element program ANSYS is used to calculate the static and dynamic calculation of the nose sill at the outlet of Baihetan spillway tunnel,analyze the displacement and stress of each part of the nose sill,and compare and analyze the shape of the nose sill with different side wall heights.The most unfavorable positions that may cause structural damage are discussed,and reasonable conclusions and suggestions for engineering measures are given.

关 键 词：挑流鼻坎 流速高 泄量大 有限元 静动力分析 

分 类 号：TV135.23[水利工程—水力学及河流动力学]