Page 159 - 《水资源与水工程学报》2024年第5期
P. 159
!35 "!5 # & ' ( ) & * + , - Vol.35No.5
2024 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2024
DOI:10.11705/j.issn.1672-643X.2024.05.19
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MNFOP:TV731 QRSTU:A QVWP:1672643X(2024)05015509
Numericalsimulationofvibrationresponseoftheundergroundplant
structureinalargepumpedstoragepowerstation
2
1
2
2
YANGZhao,LIUGuoqing,LIUYang,XULianghua
(1.StateGridNingxiaElectricPowerEcotechResearchInstitute,Yinchuan750004,China;
2.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing100048,China)
Abstract:Thevibrationproblem isprominentinpumpedstoragepowerstations,andstrongvibrations
canseriouslyaffectthesafeandstableoperationofpowerunitsandplants.Thisstudyemployedviscoe
lasticartificialboundariestosimulatetheboundaryconditionsattheconnectionpartsbetweentheplant
andsurroundingrock.Firstly ,thenaturalfrequencycharacteristicsofthewholeundergroundplantstruc
tureofaunitinFengningPumpedStoragePowerStationwascalculatedandanalyzed ,theresonance
checksofwhichwerethenconducted.Subsequently ,thetimehistorymethodwasusedtocalculateand
analyzethevibrationresponsesoftheplantstructureunderpulsationpressure ,afterwhichthecalculation
resultswerecomparedwiththemeasureddata.Theresultsshowthatthefirst20naturalfrequenciesofthe
wholeplantstructurerangefrom13.32to34.90Hz ,indicatingaverylowriskofstructureresonance.
Thereislittledifferencebetweenthecalculatedvalueandmeasuredvalueoftheverticalrootmean
squaredaccelerationateachmeasuringpointofthefloors,whichindicatesthatthenumericalanalysis
methodisreasonableandeffective.Inaddition ,themaximumvibrationresponseofeachtypicalpartof
thestructuremeetsthevibrationcontrolstandardoftheplantunderpumpingcondition.Exceptthatthe
maximumverticalrootmeansquareaccelerationoftheturbinefloorexceedsthehumanhealthevaluation
standard ,alltheindexesoftheotherstructuresmeetthevibrationcontrolstandardoftheplantunder
powergenerationcondition.
Keywords:pumpedstoragepowerstation;undergroundplantstructure;pulsationpressure;viscoelastic
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