Page 167 - 《水资源与水工程学报》2022年第3期
P. 167
!33 " ! 3 # & ' ( ) & * + , - Vol.33No.3
2022 $ 6 % JournalofWaterResources&WaterEngineering Jun.,2022
DOI:10.11705/j.issn.1672-643X.2022.03.21
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8IBJK:TV312 LMNOP:A LQRK:1672643X(2022)03016306
VibrationresponsepredictionofahydropowerstationbasedonIGA-BPNN
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CHENJinquan ,WANGHaijun ,LIUJuanli,LIUTong,LIANGChao
(1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjianUniversity,Tianjin300350,China;
2.SchoolofCivilEngineering,TianjianUniversity,Tianjin300350,China;3.ErtanHydropowerPlant,
YalongRiverHydropowerDevelopmentCo.,Ltd.,Panzhihua617000,China)
Abstract:Inordertoachieveintelligentpredictionoftheoveralloperationconditionsofthehydropower
plantstructurevibrationandsolvetheproblemsofthecouplingofmultiplevibrationsourcesandrandom
nessofvibrationresponse ,weproposedapredictionmodelbasedonimprovedgeneticalgorithm-back
propagationneuralnetwork(IGA-BPNN)tostudythepowerhousevibrationresponseofariverbedhy
dropowerstation.Firstly ,theinitialweightvaluesandthresholdsofBPNNareoptimizedbyIGA,which
ischaracterizedbytheadvantagesofefficientparallelismandglobalsearch ,andthenthepredictedvalues
ofstructuralvibrationdisplacementareprocuredbytrainingtheBPNNnetwork.Theprototypeobserva
tionexampleshowsthatthemaximumrelativeerrorofthepredictedvibrationdisplacementsatthemeas
urementpointsdoesnotexceed11%;theIGA-BPNNmodelissignificantlysuperiortoothermodelsin
termsofpredictionaccuracyandconvergenceperformance ,indicatingthatthepredictionmethodiseffec
tiveandfeasible.Thisstudycanprovideareferenceforvibrationresearchofothertypesofhydropower
plants.
Keywords:riverbedhydropowerstation;plantvibrationresponseprediction;improvedgeneticalgorithm
(IGA);backpropagationneuralnetwork(BPNN);vibrationresponse
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