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:1672643X(2024)05015509
                   Numericalsimulationofvibrationresponseoftheundergroundplant
                              structureinalargepumpedstoragepowerstation


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                                  YANGZhao,LIUGuoqing,LIUYang,XULianghua
                           (1.StateGridNingxiaElectricPowerEcotechResearchInstitute,Yinchuan750004,China;
                             2.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing100048,China)
                 Abstract:Thevibrationproblem isprominentinpumpedstoragepowerstations,andstrongvibrations
                 canseriouslyaffectthesafeandstableoperationofpowerunitsandplants.Thisstudyemployedviscoe
                 lasticartificialboundariestosimulatetheboundaryconditionsattheconnectionpartsbetweentheplant
                 andsurroundingrock.Firstly ,thenaturalfrequencycharacteristicsofthewholeundergroundplantstruc
                 tureofaunitinFengningPumpedStoragePowerStationwascalculatedandanalyzed ,theresonance
                 checksofwhichwerethenconducted.Subsequently ,thetimehistorymethodwasusedtocalculateand
                 analyzethevibrationresponsesoftheplantstructureunderpulsationpressure ,afterwhichthecalculation
                 resultswerecomparedwiththemeasureddata.Theresultsshowthatthefirst20naturalfrequenciesofthe
                 wholeplantstructurerangefrom13.32to34.90Hz ,indicatingaverylowriskofstructureresonance.
                 Thereislittledifferencebetweenthecalculatedvalueandmeasuredvalueoftheverticalrootmean
                 squaredaccelerationateachmeasuringpointofthefloors,whichindicatesthatthenumericalanalysis
                 methodisreasonableandeffective.Inaddition ,themaximumvibrationresponseofeachtypicalpartof
                 thestructuremeetsthevibrationcontrolstandardoftheplantunderpumpingcondition.Exceptthatthe
                 maximumverticalrootmeansquareaccelerationoftheturbinefloorexceedsthehumanhealthevaluation
                 standard ,alltheindexesoftheotherstructuresmeetthevibrationcontrolstandardoftheplantunder
                 powergenerationcondition.
                 Keywords:pumpedstoragepowerstation;undergroundplantstructure;pulsationpressure;viscoelastic

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