浅水中航行船舶的水动力系数.pdf

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1、第8卷第3期船舶力学VoI.8No.32004年6月JournaIofShipMechanicsJun.2004ArticIeID!1007-7294"2004#03-0046-09HydrodynamicCoefficientsofShipswithForwardSpeedinShallowWatersM.HASANADIL1,DUANWen-yang1,WANGYu1,2(1CoIIegeofShipbuiIdingEngineering,HarbinEngineeringUniversity,Harbin150001,Chin

2、a;2NavaIResearchCenter,Beijing100073,China)Abstract:Effectsofdepthandforwardspeedonhydrodynamiccoefficientsofshipsarepresentedinthispaper.AmodifiedsimpIeGreenfunctiontechniguewasusedtocaIcuIate2DcoefficientswhiIestriptheorywasusedtocaIcuIate3Dcoefficients.NumericaIresu

3、ItsareprovidedforhydrodynamiccoefficientsofparaboIichuIIship.Itisfoundoutthatbothdepthandforwardspeedhaveconsider!abIeeffectsonhydrodynamiccoefficientsofship.Keywords:hydrodynamiccoefficients;Greenfunctiontechnigue;striptheory;parabolichullCLCnumber:U661.3Documentcode:

4、A1IntroductionCorrectpredictionofhydrodynamiccoefficientsisveryvitaIinordertopredictcorrectIytheseakeepingpropertiesofshipsmovinginshaIIowwatersandoffshorestructurescarryingoutoiIdriIIingnearshore.AIsotopredictthemaneuveringpropertiesofshipsinshaIIowwaters,correctpredi

5、ctionofhydrodynamiccoefficientsisessentiaI.DuringwarscenarionavaIshipsareadvisedtoescortthemerchantvesseIsthroughshaIIowwatersinordertoavoidthesubmarineattack.TheexactknowIedgeofship!spropertiesinshaIIowwatersbecomesmorecriticaIinsuchsituations.Thepurposeofwritingthisp

6、aperistopresenttheeffectsofdepthandforwardspeedonhydrodynamiccoefficientsofships.The2DhydrodynamiccoefficientshavebeencaIcuIated[1]usingsimiIarapproachasgivenbyPouIAndersenandHEWuzhou.AmodifiednumericaItechnigueispresentedtosatisfytheradiationboundarycondition.The3Dhyd

7、rodynamicco![2]efficientshavebeencaIcuIatedusingstriptheorymethodbySaIvesen,TuckandFaItinsen.AIthoughthecodesbasedon3D-paneImethodshaveemergedIikeWAMITandSWAN,butstriptheoryisstiIIpopuIarbecauseofitsaccuracy,IesscomputationaItimeandabiIitytocaterforforwardspeedeffects.

8、Receiveddate"2003-03-28Foundationitem:SupportedbytheNationaINaturaIScienceFoundationofChinaunderGrantNo.10272035Biogr