LNG運(yùn)輸船總體設(shè)計與型線優(yōu)化研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文LNG運(yùn)輸船總體設(shè)計與型線優(yōu)化研究姓名：張則松申請學(xué)位級別：碩士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計制造指導(dǎo)教師：王言英20040301AbstractLNGcarrieristhehigh—valuedcivilship，ChinashipbuildingindustryisnOWexploringtesearchanddesignLNGcarrier。Inthisthesis，theevolutionanddevelo

2、pmemforegroundoftheLNGcarrieraresystematicallyanalyzedAccordingtotherealshipdocument，usingregressionmethodtoanalyzethepfincipledimensionsoftheLNGcarrierGeneralarrangement，typicallystructuralgascargotankandspecialfireproo

3、fmgrequirementoftheLNGcarrierareanalyzedindetailTheresistanceoftheLNGcarrierisdividedintothreeareas：inthefirstpotentialflowarea，calculatetheliquidveloc幻potentialinthewayofSecondstepspanelmethodbasedasDawsonmethod，asRanki

4、nesourse，satisfiedwithfreesurfaceboundaryconditionthroughiterationmethod；inthesecondthinboundarylayerareacomputethemiddleandtheforepartoftheshipboundarylayerasboundarylayermethod，fromthestagnationpointusingtheimegralmeth

5、odtoIaminarflowandthenthetransition；inthethirdturbulenceaJreathecalculationoftheviscousresistanceisusedRenaultAverageNavier—Stokes(RANS)EquationastwoequationsK一占turbulencemodejinthefollowingshipcoordinatesystemanditsboun

6、daryconditiondependsOiltheresultscalculatedbytheboundarylayerandpotentialflow，usingfiniteanalyzemethodorSIMPLEmethodtotreatthecouplingbetweenvelocityandpressureThemoldedlineoptimizationmethodwhichisbased0i1theresistancep

7、erformance，usinguprightdesignmethodtooptimizethebulbbowofthefatherLNGcarriertogetninedifferentschemes，andcalculatetheirwaveresistance，frictionresistanceandviscousresistance。Aftercomparisonitcallbegottheoptimizationshipty