简介：CallaghanandWhite(2009)putforwardtheautomatedwhitecapextraction(AWE)techniquetodeterminethewhitecapcoverage(W).AnimprovedAWEwasusedtoanalyzeimagescollectedintheSouthChinaSeaduring2012and2013andinwesternPacificduring2015todetermineW.Theinfluencesofmeteorologicalandoceanographicfactorsonwhitecapcoveragewereinvestigatedinthisstudy.ItisfoundthatWincreaseswithwindspeed.ScalefactorandexponentofparameterizationforW(U10)varygreatlyindifferentmodels.Overall,thereisalargerscatterofWatlowwindspeedthanathighwindspeed.Wdecreaseswiththeincreasingofwaveage.Comparedwithwindspeed,thescatterofWissmallerwithwaveage,whichmeanstheimpactofwaveageonthewhitecapcoverageismorerobustundervariousenvironmentalconditions.ThereisnosignificantdependenceonSSTandwhitecapcoverageseemstoweaklydecreasewithSST.Wdecreaseswiththeatmosphericstability.RelationshipbetweenWandwindspeedchangewhenswellsaredominant.SwellcansuppresswavebreakinganddecreaseW.Theeffectisindependentofthedeflectionanglebetweenwindwaveandswell.

简介：Thispaperinvestigatesasimplifiedmethodtodeterminetheoptimalstiffnessofflexibleconnectorsonamobileoffshorebase(MOB)duringthepreliminarydesignstage.Athree-modulenumericalmodelofanMOBwasusedasacasestudy.Numerousconstraintforcesandrelativedisplacementsfortheconnectorsatroughseastateswithdifferentwaveangleswereutilizedtodeterminetheoptimizedstiffnessoftheflexibleconnectors.Therangeofoptimalstiffnessesfortheconnectorswasobtainedbasedonthecombinationandintersectionoftheoptimizedstiffnessresults,andtheimplementationstepswereelaboratedindetail.Thepercentagereductionsoftheoptimizedandoptimalstiffnessoftheflexibleconnectorweredeterminedtoquantitativelyevaluatethedecreasesoftheconstraintforceandrelativedisplacementoftheconnectorscomparedwiththosecalculatedbyusingtheoriginalrangeoftheconnectorstiffnesses.Theresultsindicatetheaccuracyandfeasibilityofthismethodfordeterminingtheoptimalstiffnessoftheflexibleconnectorsanddemonstratetherationalityandpracticabilityoftheoptimalstiffnessresults.Theresearchideas,calculationprocess,andsolutionsfortheoptimalstiffnessoftheflexibleconnectorsofanMOBinthispapercanprovidevaluabletechnicalsupportforthedesignoftheconnectorsinsimilarsemisubmersiblefloatingstructures.