基于運行時模態(tài)分析和代理模型的大壩力學(xué)參數(shù)反演方法

張翰， 張 鋒2， 譚堯升1， 姚孟迪2， 鄧檢華

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

中圖分類號：TV39 文獻標(biāo)志碼：A 文章編號：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

近幾十年來，我國西南地區(qū)修建了一批高庫大壩，日常運行管理中十分重要的任務(wù)，是確保這些工程結(jié)構(gòu)的安全穩(wěn)定。（剩余7698字）