URANS simulations of ship motion responses in long-crest irregular waves-中国Betway体育网页登陆

摘要 Inthispaper,numericalpredictionofshipmotionresponsesinlong-crestirregularwavesbytheURANS-VOFmethodispresented.Awhitenoisespectrumisappliedtogeneratetheincomingwavestoevaluatethemotionresponses.Theprocedurecanreplaceadecadeofsimulationsinregularwavewithonesingleruntoobtainacompletecurveoflinearmotionresponse,considerablyreducingcomputationtime.Acorrectionprocedureisemployedtoadjustthewavegenerationsignalbasedonthewavespectrumandachievesfairlybetterresultsinthewavetank.Threeshipmodelswithfivewaveconditionsareintroducedtovalidatethemethod.Thecomputationsinthispaperarecompletedbyusingthesolvernaoe-FOAM-SJTU,asolverdevelopedforshipandoceanengineeringbasedontheopensourcecodeOpenFOAM.Thecomputationalmotionresponsesbytheirregularwaveprocedurearecomparedwiththeresultsbyregularwave,experimentsandstriptheory.Transferfunctionsbyirregularwavecloselyagreewiththedataobtainedintheregularwaves,showingnegligibledifference.Thecomparisonbetweencomputationalresultsandexperimentsalsoshowgoodagreements.TheresultsbetterpredictedbyCFDmethodthanstriptheoriesindicatethatthismethodcancompensatefortheinaccuracyofthestriptheories.Theresultsconfirmthattheirregularwaveprocedureisapromisingmethodfortheaccuratepredictionofmotionresponseswithlessaccuracylossandhigherefficiencycomparedwiththeregularwaveprocedure.

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URANS simulations of ship motion responses in long-crest irregular waves

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