Page 153 - 《水资源与水工程学报》2023年第5期
P. 153

! 34 " ! 5 #                      & ' ( ) & * + , -                               Vol.34No.5
               2023 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2023

            DOI:10.11705/j.issn.1672-643X.2023.05.17


              'PtFÝUâãÍ ãG»_UtHI0>?


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                 Ä%|Ëk¸Ùk 4.713MPa。ø¹üÆ7î 7بF‘Å ÉÚ͎*‡@x¯üÆ7î«7س
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                 EFGHI:TV663.2;TV312   JK7LM:A    JNOI:1672643X(2023)05014906
            Flowinducedvibrationofradialgatepiersystem basedonfluidstructurecoupling


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                                   LIUJiliang,XIHonglin,SIZheng,DONGXurong
                  (1.CollegeofWaterResourcesandHydropowerEngineering,Xi’anUniversityofTechnology,Xi’an710048,China;
                  2.ShaanxiProvinceInstituteofWaterResourcesandElectricPowerInvestigationandDesign,Xi’an710001,China)
                 Abstract:Inpracticalengineering,theradialgateandgatepierarecloselyconnectedandinteractwith
                 eachotherunderthefluctuatingpressureofwaterflow,forminganintegralgatepiersystem.Inorderto
                 understandtheinteractionbetweenthegateandthepier ,thefluidstructurecouplingtheoryisadoptedto
                 studytheflowinducedvibrationoftheradialgatepiersystem.Takingtheradialgateofacertainwater
                 conservancyprojectasanexample,threedimensionalfiniteelementmodelswereestablishedforthesin
                 glebodyoftheradialgateandtheradialgatepiersystemtocalculatetheirnaturalvabrationfrequencies.
                 Thenthedynamicresponsesofthetwomodelswereanalyzedbasedontheresultsofmodalanalysis ,by
                 whichthemutualinfluencelawsofthegateandpierintermsofdynamiccharacteristicsandflowinduced
                 vibrationresponseweresummerized.Theresultsshowthatthepierhasasignificantinfluenceonthedy
                 namiccharacteristicsandresponseofthegate.Whenconsideringtheinfluenceofthepier ,thenaturalvi
                 brationfrequencyoftheradialgatedecreased ,withthefourthordernaturalvibrationfrequencydecrea
                 singthemostby61.45%,whichmainlymanifestedasthesupportarmvibration.Furthermore,thehori
                 zontaldisplacementofthepanelalongtheriverdecreasedby44.58% andthatofthesupportarm in
                 creasedby37.93%;consequently,thedynamicstressofthepaneldecreasedby41.70% andthatofthe
                 supportarmincreasedby30.71%.Likewise,theflowinducedvibrationofthegatehasasignificantim
                 pactonthestressofthepier ,whichincreasedby4.713MPacomparedtothemaximumstresscalculated
                 bythedynamiccoefficientofthepier.Theradialgatepiersystemmodelcanmoreaccuratelyandcom
                 prehensivelyevaluatethesafetycharacteristicsoftheradialgateandpierunderflowinducedvibration

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