Page 111 - 《水资源与水工程学报》2024年第2期
P. 111
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.12
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GHIJK:TV662 .2;TV663 .2 LMNOP:A LQRK:1672643X(2024)02010708
Analysisoffloodgatepiervibrationinducedbyunderflow
dissipationandvibrationreductionmeasures
2
2
2
1
1
LIUFang,LIUQing,LIHuokun,HUANGWei,LIUBo,
2
2
2
TANGYiyuan,LIYuekang,WANGWentao
(1.StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin
300350,China;2.SchoolofInfrastructureEngineering,NanchangUniversity,Nanchang330031,China)
Abstract:Underflowdissipationfloodgatesaresubjectedtoseverepiervibrationsduringhighflowdis
charge.Addressingtothisissue,thehydraulicelasticitymodeltestandprototypeobservationofahydro
powerstationwereconducted,withwhichtwovibrationreductionmeasuresofimprovingpierstructure
andoptimizingreservoirregulationschemeswereproposed.Themodeltestprovideddatasupportforthe
analysisofpiervibrations ,whiletheprototypeobservationvalidatedthereliabilityofthemodeltest.
3
Whenthedischargeflowis5400m /s,thecombineddischargeapproachof“loworificesandsurfaceor
3
ifices”canreducetheflowthroughsurfaceorificesfrom5400m /sinstandalonedischargeto1919
3
3
m /sincombineddischarge,andtherest3481m /scandischargefromtheloworifices.Inthiscase,
thestandarddeviationofpiervibrationdisplacementatsurfaceorificesdecreasesfrom182.3to51.7
μ m,achievingavibrationreductioneffectof71.6%.Whenthedischargefromthesurfaceorificesrea
3
ches10030m /s,reinforcingthepierscanreducethestandarddeviationofpiervibrationdisplacement
from288.8to129.6μ m,leadingtoavibrationreductioneffectof55.1%.
Keywords:underflowdissipationfloodgate;floodgatepiervibration;vibrationreductionmeasure;mod
eltest ;prototypeobservation
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