Page 162 - 《水资源与水工程学报》2023年第3期
P. 162

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.20


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                 ABCDE:TV731   FGHIJ:A    FKLE:1672643X(2023)03015807

                   Influenceofdeepwaterstoplayoutoftransversejointonvolutestress

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           CHENGShuai,QIAOHongwei,WANGJunbo,NANJiang,GUOWei,LIZhihua,ZHANGShiming
                           (1.Xi’anThermalPowerResearchInstituteCo.,Ltd.,Xi’an710054,China;2.Shenzhen
                               EnergyHydrpowerInvestmentManagementCo. ,Ltd.,Chengdu610041,China)
                 Abstract:Thelayoutofthedeepwaterstopschemeofthetransversejointhasagreatinfluenceonthe
                 stressofthevolutepartoftheaxialflowturbineunit,itisusuallydeterminedaccordingtotheengineering
                 experience,andthereisnounifiedstandard.However,itiscommonlyrecognizedthatanoptimallayout
                 ofthewaterstopschemeshouldnotonlymeettheantiseepageandsafetyrequirement,butalsohaveas
                 lesseffectonthevolutestressaspossible.Basedonanactualaxialflowhydropowerstationproject,the
                 ANSYSthreedimensionalfiniteelementmodelofthepowerhouseisestablishedtosimulatetheinfluence
                 ofdifferentwaterstoparrangementsonthevolutestressunderthetwodeepwaterstopschemesofupstream
                 closureandupstream connectionundernormaloperationandunitmaintenanceconditions.Then ,the
                 stresschangesofthevoluteinletsection ,theinternaltypicalsectionandtheexternalconcreteunderthe
                 twodeepwaterstopschemesarecomparedandanalyzed.Theresultsshowthatwiththeriseofthewater
                 stopposition ,thestresschangesofthevoluteunderthetwoschemesarethesame;butunderthesame
                 waterstopposition,theupstreamconnectionschemehasmorethantwicethedecreasedmagnitudeonthe
                 variousstressesofthevolutethantheupstream closurescheme.Therefore ,theupstream connection
                 schemeispreferredwhenadeepwaterstopoftransversejointislaid.
                 Keywords:hydropowerhouse;deepwaterstoplayoutoftransversejoint;axialflowturbineunit;volute
                 structure;finiteelementmethod;structuralstress
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