水力发电学报2025，Vol.44Issue(4)：31-41,11.DOI:10.11660/slfdxb.20250404
白鹤滩谷幅变形特征的多类函数自适应方法分析研究
Study on valley deformation characteristics of Baihetan Reservoir based on adaptive multi-function method
摘要
Abstract
To achieve a deep understanding of the valley deformation in a high arch dam region,it is essential to conduct a quantitative analysis of the deformation characteristics.This paper describes a multi-function adaptive analysis method for this purpose,based on long-term in-situ monitoring data from the Baihetan high arch dam on the Jinsha River.This method involves preprocessing the data and decomposing them through variational mode decomposition,followed by the selection of its modal signals via fast Fourier transform.It determines the range of peak count values using a prominence factor derived from the quantile method,and performs data fittings with three types of base functions truncated to different numbers of terms.Then,by using an explicit expression formulated for valley deformation,we derive explicit models for its velocity and acceleration.In a case study of the Baihetan Reservoir,typical monitoring data are used to demonstrate the analysis of valley deformation characteristics.The results have verified that our method achieves explicit solutions for the time series of valley deformation and its velocity and acceleration,enhancing the reliability and practical applicability of the analysis results.The findings,grounded with the Baihetan in-situ measurements,have theoretical and practical significance for the development of high arch dams.关键词
特高拱坝/谷幅变形/变形特征/变分模态分解/多类函数自适应方法/白鹤滩水电站Key words
high arch dam/valley deformation/deformation characteristics/VMD/adaptive multi-function method/Baihetan reservoir分类
水利科学引用本文复制引用
李明熹,史宏娟,徐建荣,刘渊泽,徐卫亚..白鹤滩谷幅变形特征的多类函数自适应方法分析研究[J].水力发电学报,2025,44(4):31-41,11.基金项目
国家自然科学基金重点项目(51939004) （51939004）
国家重点研发计划项目(2018YFC0407004) （2018YFC0407004）
中央高校基本科研业务费专项资金资助(B200203093)) （B200203093）
