摘要
为了研究弧形闸门面板的振动特性,采用混沌理论,通过对时间序列进行处理,确定延迟时间τ、嵌入维数m,进行相空间重构,并计算时间序列的混沌特征值,进而对弧形闸门在启闭过程中面板振动的复杂性进行研究。以大石峡水电站弧形闸门面板的振动为研究对象,根据面板脉动压强模型试验资料,分析弧形闸门面板在不同开度、不同水位的振动情况。结果表明:弧形闸门面板在高水位时的振动复杂程度高,且其底缘的振动情况较其他位置更复杂;在小开度时弧形闸门面板的振动复杂程度减弱,线性相关性高,非线性振动建模计算可由较少独立变量进行控制。
To study the vibration characteristics of the radial gate panel,chaos theory was used to process the time series to determine the delay timeτand the embedding dimension m,to reconstruct phase space,and to calculate the chaotic eigen values of the time series.The complexity of the vibration of the panel during the opening and closing process of the radial gate was then studied.Taking the vibration of the radial gate panel of Dashixia Hydropower Station as the research object,the vibration of the radial gate panel at different opening degrees and different water levels was analyzed according to the panel pulsating pressure model test data.The results showed that the vibration complexity of the radial gate panel was high at high water level,with the bottom edge being more complicated than that of other parts.At the small opening degree,the vibration complexity of the radial gate panel decreased and the linear correlation increased.It indicates that linear vibration modeling calculations can be controlled by fewer independent variables.
作者
杨佼佼
徐国宾
YANG Jiaojiao;XU Guobin(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300354,China)
出处
《水资源与水工程学报》
CSCD
2020年第3期207-211,共5页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(51779166)。
关键词
弧形闸门
闸门面板
振动特性
混沌理论
时间序列
大石峡水电站
radial gate
gate panel
vibration characteristics
chaos theory
time series
Dashixia Hydropower Station
