基于运行时模态分析和代理模型的大坝力学参数反演方法

张翰， 张 锋2， 谭尧升1， 姚孟迪2， 邓检华

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Inversion Method of Dam Mechanical Parameters based on Operational Modal Analysis and Surrogate Model

中图分类号：TV39 文献标志码：A 文章编号：1005-8249（2025）01-0163-04

DOI：10.19860/j.cnki.issn1005-8249.2025.01.030

ZHANG Han1， ZHANG Feng2，TAN Yaosheng1，YAO Mengdi2，DENG Jianhua3 （1.China Three Gorges Corporation，Wuhan 430010， China； 2. China Three Gorges Construction Engineering Corporation， Chengdu 61OO95， China； 3.State Grid Electric Power Research Institute/ NARI Group Corporations， Nanjing 2111O0，China) Abstract：Itisofgreatsignificance toinvertdam mechanical parametersbasedon monitoring datafordamsafetyevaluation. Comparedwithstaticmonitoringdata，vibrationsignalcanbeterreflcttheoveralltructurecharacteristicoftedam.Itcanbe usedtoimprovethereliabilityofdammechanicalparameter inversionbyidentifyingdammodalparameters throughoperational modal analysis method.Intermsoftheissethatthefiniteelementanalysismodelneds tobecalledrepeatedyduring inversio，asurogatemodelofmappng materialparameters tomodal parameters isproposedbyusing neuralnetwork.inally， theoptimizationproblemofiversionissolvedbyusingadaptivegridsearchalgorithm.Theefectivenessof theproposedmethod is verified by inverting the zonal elastic modulus of the numerical model of a concrete arch dam.

Key Words： parameter inversion；operational modal analysis；dam；surrogate model； health monitoring

0 引言

近几十年来，我国西南地区修建了一批高库大坝，日常运行管理中十分重要的任务，是确保这些工程结构的安全稳定。（剩余7698字）