Page 120 - 《水资源与水工程学报》2023年第3期
P. 120

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

            DOI:10.11705/j.issn.1672-643X.2023.03.14


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                 ABCDE:TV312   FGHIJ:A    FKLE:1672643X(2023)03011607
                     Propagationlawofhydraulicvibrationofpipelinesinsurrounding

                                      rockofpumpedstoragepowerstation

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                               WANGHaijun ,CHENBo ,YANGXiuwei ,LIANJijian               1,2
                  (1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjinUniversity,Tianjin300350,China;
                                 2.SchoolofCivilEngineering,TianjinUniversity,Tianjin300350,China)
                 Abstract:Inordertoinvestigatethegroundvibrationcausedbytheoperationofpumpedstoragepower
                 stations,takingapumpedstoragepowerstationasanexample,weestablishedafiniteelement-infinite
                 elementcouplingmodelof “hydraulicload-pipe-surroundingrock”tostudythepropagationlawofhy
                 draulicvibrationofthepipelineinthesurroundingrock ,soastoprovidesometechnicalsupportforthe
                 vibrationreduction.Firstly,basedonhydraulicvibrationtheory,transfermatrixmethodandhydraulic
                 impedancemethod ,themethodforcalculatingthehydraulicfluctuatingloadofthepumpedstoragepower
                 stationpipelineisestablished.Then ,thecouplingmodelisusedtosystematicallyanalyzetheinfluenceof
                 thechangesofelasticmodulus,dampingandunitoperatingstateonthepropagationofhydraulicvibration
                 ofpipelineinthesurroundingrock ,andthedampingmeasuresareproposed.Thecalculationresultsshow
                 thatwiththeincreaseoftheelasticmodulusofrock ,theattenuationrateofhydraulicvibrationofpipeline
                 inthesurroundingrockdecreasedandthegroundvibrationcausedbyhydraulicvibrationofpipelinein
                 creased.Whenthedampingratioofthesurroundingrockincreasedintherangeof0.02to0.30 ,thein
                 tensityofthesurfacevibrationcausedbythehydraulicvibrationofpipelinekeptdecreasing.Whenthe
                 dampingratioincreasedfrom0.02to0.10 ,thesurfacevibrationintensitydecreasedby85% -97%;
                 whenthedampingratioincreasedfrom0.20to0.30,thesurfacevibrationintensitydecreasedonlyby
                0.1% to1.0%,whichchangedrelativelylittle.Forthispumpedstoragepowerstation,whenmoreunits
                 areinoperation,theresultinggroundvibrationisgreaterandthegroundvibrationintensityduringpum

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