小型自治水下机器人外形优化设计及水动力特性数值模拟

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1、ShapeOptimizationandSimulationAnalysisofAutonomousUnderwaterVehicle(AUV)AbstractSinceoceancontainsgiantnaturalresources，developingandusingmarineresourceswiselyisofgreatimportancetohumansurvivalanddevelopmentUnderwaterrobotisanimportantmeantostudyandexploitoce

2、anAutonomousunderwatervehicle(AUV)，asabranchoftheunderwatervehicles，hassomanyadvantagessuchasadaptabletoenvironmentalconditions，extensivescopeofactivity,convenientinoperationandsoon，whichmakesittobeahotresearchfieldAccordingtothequalificationofdesignspecifica

3、tion，ToresearchtheresistanceandflowconditionofAUV,westudythehydrodynamiccharacteristicsofitBecausetheenergyiscarriedbyAUVanditislimited，theAUVhasdomeonbow,andtheformofitisoptimaldesignedtominimizetheenergywastingTheshapeofAUVhasgreateffectontheresistanceofthe

4、water,whenAUVissailinginthewater,sopropershapecangreatlyreduceAUVinwaterresistanceInthispaper,threedifferentshapemodelsofAUVarechosen，severalcomparativeexperimentsaredonetooptimizetheshapeoftheAUV．NumericalsimulationintheflowfieldisprocessedbytheCFDanalysisso

5、ftwareCFX，andtheforce，pressureparametersoftheAUVaregivenThenbestshapeofthethreeischosenbycomparingtheparametersTheselectedshapeisfurtheranalYZed，thevelocityandpressuredistributionchartsofthemodelareintuitivelyshownTheresearchisusefulforthestructuredesignofAUV

6、,andreducethecostofthedesigngesearchthesituationofviscousflowfieldaroundAUV,throughthethree—dimensionalsimulationofAUV’shydrodynamicforceByusingfivegridmodelsandthreeturbulencemodels，simulatetheAUV’smovement，thenincomparisonwiththecalculativevalueoftheformula

7、andconsideringthecomputationalspeed，theoptimumgridmodelandturbulencemodelisgot，asabasicconditionofthesubsequentsimulationThensimulateAUV’smovementindifferentvelocity,workingdepthandReynold。snumbe‘andgetmanyhydrodynamicperformance，includingtheviscousdrag，press

8、uredrag，totaldrag．everydragcoefficient，surfacepressuredistribution，thepressureandvelocitydistributionandsoonBesidesheavemovementofAUVisalsosimulatedTheresearchprovesthatthecomputersimulat