摘要
针对影响高水头船闸安全高效运行的阀门顶止水自激振动问题,研发无缩尺效应的1∶1切片试验装置,实现了高水头阀门顶止水工作特性室内真实模拟。通过不同材料、不同型式顶止水自激振动试验,采用高速摄像技术手段,揭示了窄缝射流诱发顶止水自激振动机理。研究表明,止水自激振动呈现平稳的周期性大振幅特性,自激振动频率与其硬度(弹模)呈正相关关系。
Aiming at the problem of self-excited vibration of the top seal of ship lock valve that affects the safe and efficient operation of high-head ship lock,a 1:1 slice test device without scale effect is developed to realize the indoor real simulation of the working characteristics of top seal of high-head valve.The self-excited vibration tests of top seal with different materials and different types are carried out,and the mechanism of top seal self-excited vibration induced by narrow slit jets is revealed through high-speed camera technology.The research shows that the self-excited vibration of top seal presents a stable periodic large amplitude characteristic,and the frequency of the self-excited vibration has a positive correlation with its hardness(elastic modulus).
作者
王晓辉
王新
张宏洋
鲁琳
WANG Xiaohui;WANG Xin;ZHANG Hongyang;LU Lin(College of Water Resources,North China University of Water Resources and Hydropower,Zhengzhou 450046,Henan,China;Key Laboratory of Navigation Structure Construction Technology of Ministry of Transport,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Zhengzhou Hydrology and Water Resource Survey Bureau,Zhengzhou 450000,Henan,China)
出处
《水力发电》
北大核心
2020年第9期111-114,135,共5页
Water Power
基金
国家重点研发计划项目(2018YFB1600400)
国家自然科学基金项目(51779151,51609087)。
关键词
船闸
反弧门
顶止水
自激振动
切片试验
ship lock
reverse arc gate
top seal
self-excited vibration
slice test
