海底管道懸跨段渦激振動(dòng)動(dòng)力特性及動(dòng)力響應(yīng)的數(shù)值模擬.pdf

1、分類號UDC密級Y828五77研究生學(xué)位論文海底管道懸跨段渦激振動(dòng)動(dòng)力特性及動(dòng)力響應(yīng)的數(shù)值模擬研究生姓名耋筮指導(dǎo)教師姓名郭海燕麴撞申請學(xué)位級別亟專業(yè)名稱隨塞速塞王程壁隨控王猩論文答辯日期至鯉墨生魚旦旦學(xué)位授予日期壘竣墨生魚旦中國海洋大學(xué)NumericalSimulationontheDynamicCharacteristicsandDynamicResponsesofVortex—InducedVibratiOnofSubmariReF

2、reeSpanningPipelinesConveyingFlUidAbstractSubmarinepiFdinesarethelifelinesofmarineoilfieldsThetransportationsofoil，gasandwaterinthemarineoilfieldarealmostaccomplishedbythesubmarinepipelinesSoitisthesubmarinepipelinesthat

3、makethemarineoilfieldcontactcloselyThispapermainlyfocusesontheVortexInducedVibration(vIV)ofsubmarinefreespanningpipelinesThegeneratingmechanismaswellaSpropertiesandrelatedparametersofVⅣareexpressedThepartialdifferentiale

4、quationfortheresponseofamarinepipelineconsideringtheeffectoftheinternalflowingfluidandtheexternalmarineenvironmentalconditionisderivedThedynamiccharacteristicswithoutconsideringdampingandconsideringdampingarebothanalyzed

5、，thenusingreducedveloeityasacontrolparameter，derivestheallowablespanlengthofsubmarinepipelinesInordertofindthedynamicresponseofthefleespancombiningMatteoLueaFacchinetti’Swakeoscillatormodelwiththedifferentialequationofth

6、efreespantogetthecouplingequationsbe柳eenpipeandfluid，thefiniteelementmethodcombinedwiththesimpleiterationisusedtosolvethesystemofequationsTheresultsindicatethat：inthesamecase，theallowablespanlengthconsideringdampingisali

7、ttlesmallthanthatwithoutconsideringdamping，theallowablespanlengthofthesubmarinepipIelinesdecreaseswithanincrementinthevelocityofinternalflow，compressionandpressure，increases謝t11allincrementintension；theflowingofinternalf