高拱坝闸墩泄流振动传递路径的模型试验分析  

Model experiment analysis of discharge vibration transmission paths in high arch dam piers

作　　者：刘庆亮 刘光昆 李庆斌[4] 宋志宇 蔡小宁 LIU Qingiang;LIU Guangkun;LI Qingbin;SONG Zhiyu;CAI Xiaoning(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;Yellow River Guxian Hydro-junction Co.,Ltd.,Zhengzhou 450018,China;Key Laboratory of Water Management and Water Security for Yellow River Basin,Ministry of Water Resources,Zhengzhou 450003,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;Jiangsu Ocean University,Lianyungang 222005,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,郑州450003 [2]黄河古贤水利枢纽有限公司,郑州450018 [3]水利部黄河流域水治理与水安全重点实验室,郑州450003 [4]清华大学水圈科学与水利水电工程全国重点实验室,北京100084 [5]江苏海洋大学,江苏连云港222005

出　　处：《水力发电学报》2024年第12期1-12,共12页Journal of Hydroelectric Engineering

基　　金：中国博士后科学基金(2023M731260);河南科技智库黄河国家战略研究基地专项基金(YF007)。

摘　　要：高拱坝闸墩在泄流过程中振动强烈易引发结构疲劳损伤甚至破坏,准确掌握其动态行为和振动机理是工程运行的安全保障。本文提出了一种基于模型试验的高拱坝闸墩泄流振动传递路径分析方法。根据水弹性模型振动试验理论,构建高拱坝闸墩水弹性模型,采集闸墩不同部位的振动加速度信息,进而采用传递熵方法分析闸墩振动传递路径,证明了传递熵能够准确捕捉复杂振动系统中的能量流动和传递方向,适用于闸墩振动传递路径分析。结果表明,闸墩侧墙内侧顶部、底部及支铰大梁是闸墩结构振动传递的三大起点,闸墩侧墙内侧中部及过流闸尾部是振动的主要汇集点。本研究为高拱坝闸墩的设计和维护提供了新的科学依据和技术手段。High arch dam piers experience intense vibrations during flood discharge,which could lead to certain fatigue damage to the structure or even a failure.A thorough understanding of their dynamic behaviors and the mechanisms of discharge vibration is essential to ensuring safe dam operation.This paper presents a new method for analyzing the transmission path of discharge vibration in high arch dam piers based on model experiments.We construct a water elastic model for the pier of a high arch dam based on the theory of water elastic model vibration test,and collect vibration acceleration information from different parts of the pier.Then,the transfer entropy method is used to analyze the vibration transmission paths in the pier.We have proved the use of transfer entropy allows accurate capture of the energy flow and transmission direction in complex vibration systems,suitable for analysis of the vibration transmission paths in the pier.The results indicate that in a pier structure,vibration transmission starts from three major positions-the top,bottom,and hinged beams on the inner pier side wall;the middle part of this wall and the tail of the gate in the flow are two major zones for vibration to gather.This study would be useful theoretically and practically for the design and maintenance of high arch dam piers.

关 键 词：闸墩 模型试验 泄流振动 传递熵 传递路径 

分 类 号：TV642.42[水利工程—水利水电工程]