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静水航行船舶粘性兴波阻力计算分析(英文) Title:AnalysisofViscousFrictionintheHydrodynamicResistanceofShipsinStillWaters Abstract: Inthispaper,weanalyzethecalculationandsignificanceofviscousfrictioninthehydrodynamicresistanceofshipsduringstillwaternavigation.Thestudyaimstoprovideinsightsintotheimportanceofaccountingforviscouseffectsandunderstandingtheirimpactonshipperformance.Byexaminingvariousfactorsinfluencingviscousfriction,suchashullshape,surfaceroughness,andflowconditions,acomprehensiveunderstandingofthisphenomenoncanbeachieved.Theresearchfindingscanguideshipdesignersandoperatorsinoptimizingshipdesignandoperatingparameterstominimizeenergyconsumptionandimproveoverallefficiency. 1.Introduction Theresistanceencounteredbyashipmovingthroughstillwaterisacomplexphenomenonthatinvolvesvariouscomponents,withviscousfrictionbeingoneoftheprimarycontributors.Viscousfrictionrelatestotheresistancegeneratedduetotheinteractionbetweentheship'shullandthesurroundingwater.Understandingandaccuratelypredictingthisresistancecomponentiscrucialforshipdesign,performanceanalysis,andoperationalefficiency. 2.ViscousFrictionPhenomenon Viscousfrictionprimarilyarisesduetotheboundarylayerdevelopmentalongtheship'shull.Theboundarylayerischaracterizedbyagradualdecreaseinflowvelocityfromthesurfaceofthehulltothesurroundingfreestream.Viscositywithinthislayergeneratesshearstresses,resultinginanetresistanceforceactingontheship. 3.CalculationMethodsforViscousFriction Severalmethodsexistforcalculatingviscousfrictioninshipresistance,includingboundarylayertheory,empiricalapproaches,andnumericalsimulations.Eachmethodhasitsadvantagesandlimitations,andtheappropriatechoicedependsonthespecificrequirementsoftheanalysis. 4.FactorsInfluencingViscousFriction a.HullShape:Thehullformsignificantlyaffectsthedevelopmentandbehavioroftheboundarylayer.Smoothandstreamlinedhullshapesexperiencereducedfrictionalresistancecomparedtomorebluntandirregularforms. b.SurfaceRoughness:Thepresenceofroughnesselementsonthehullsurfaceincreasestheresistanceduet