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
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EFGHI:TV663.2;TV312 JK7LM:A JNOI:1672643X(2023)05014906
Flowinducedvibrationofradialgatepiersystem basedonfluidstructurecoupling
1
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LIUJiliang,XIHonglin,SIZheng,DONGXurong
(1.CollegeofWaterResourcesandHydropowerEngineering,Xi’anUniversityofTechnology,Xi’an710048,China;
2.ShaanxiProvinceInstituteofWaterResourcesandElectricPowerInvestigationandDesign,Xi’an710001,China)
Abstract:Inpracticalengineering,theradialgateandgatepierarecloselyconnectedandinteractwith
eachotherunderthefluctuatingpressureofwaterflow,forminganintegralgatepiersystem.Inorderto
understandtheinteractionbetweenthegateandthepier ,thefluidstructurecouplingtheoryisadoptedto
studytheflowinducedvibrationoftheradialgatepiersystem.Takingtheradialgateofacertainwater
conservancyprojectasanexample,threedimensionalfiniteelementmodelswereestablishedforthesin
glebodyoftheradialgateandtheradialgatepiersystemtocalculatetheirnaturalvabrationfrequencies.
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.Theradialgatepiersystemmodelcanmoreaccuratelyandcom
prehensivelyevaluatethesafetycharacteristicsoftheradialgateandpierunderflowinducedvibration
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