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(lèi)號(hào)UDC密級(jí)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(qǐng)學(xué)位級(jí)別亟專(zhuān)業(yè)名稱(chēng)隨塞速塞王程壁隨控王猩論文答辯日期至鯉墨生魚(yú)旦旦學(xué)位授予日期壘竣墨生魚(yú)旦中國(guó)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