水力发电学报2025，Vol.44Issue(2)：107-115,9.DOI:10.11660/slfdxb.20250209
基于模糊聚类和随机子空间的高土石坝模态参数自动识别
Automatic modal parameter identification of high earth-rockfill dams based on MSFCM-SSI
摘要
Abstract
Owing to the large volume and complex structure of high earth-rockfill dams,identifying their modal parameters is challenging,posing difficulties to subsequent dynamic analysis.Based on earthquake measurement data,this paper presents a fuzzy C-means clustering algorithm that is based on modal stability functions,and constructs a new method of automatic modal parameter identification,namely MSFCM-SSI,by combining the algorithm with a covariance-driven stochastic subspace identification method.This new method achieves accurate and automatic identification of dam modal parameters,avoiding errors associated with traditional manual selection.Its effectiveness and accuracy are validated through application to a two-degree-of-freedom numerical model and an earth dam's two-dimensional finite element model.It is then used to identifying the modal parameters of the Lianghekou high-core rockfill dam,demonstrating its applicability and advantage in practical seismic analysis of high earth-rockfill dams.关键词
高土石坝/模态参数/随机子空间/稳定图/模糊C均值聚类Key words
high earth-rockfill dam/modal parameter/stochastic subspace/stability diagram/fuzzy C-分类
建筑与水利引用本文复制引用
刘华仁,佟大威,余佳,苏哲..基于模糊聚类和随机子空间的高土石坝模态参数自动识别[J].水力发电学报,2025,44(2):107-115,9.基金项目
天津市自然科学基金青年项目(22JCQNJC01150) （22JCQNJC01150）
