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1、ResearchonDamageCharacteristicsofDoubleBottomStructureinShipHardGroundingandmeasuresforescapingfromtheshallowAccidentsofshipgroundingwillcausesuchdisastersasshiphulldamage,environmentalpollution,lostlivesandsoon.Researchingshipgroundingisnotonlygoodforpeople'ssecularityonseaandpreventingm
2、arinepollution,butalsocanpresentfoundationforshipsincrowdwatertransportareaintermsofstandardizingvelocityandoperationrules.Inthispaper,internalmechanicsofshiphardgroundingisstudiedbynumericalsimulationmethod.Resultsofdamagedeformation,contactforces,andenergydissipationareanalyzed.Anewanti
3、-groundingdoublebottomstructure一YFispresented.Thestudyshowsthatdamagedeformationisfocusedintheareawherethestructureandtherockcontact.Sotheresearchoninternalmechanicsofhardgroundingmaymainlyconsiderlocalshipstructure;Existeneeoffloorsincreasesremarkablytheabilityofresistinggroundingofbotto
4、mstructure;inhardgroundingprocess,theverticalpenetrationofrockintodoublebottomwilldecreaseslightlybecauseofverticalcontactforce;energyabsorptionabilityoflongitudinalgirdercannotperformanditsresistinggroundingeffectwillbenegligible,whenitisfarfromgroundingarea;Bothenergyabsorptionabilityan
5、dgroundingforceofYFdoublebottomstructureareevidentlyhigherthanroutinestructure・Astheworldseconomicgrowth,watertrafficisincreasinglybusy,accidentsofshipgroundingoccurfrequently.Usually,thegroundingsituationisnotseriousintheearly.Astimegoesby,thesituationbecomesmorecomplicatebecauseofthecha
6、ngeofthetide,theaffectionofwindandwaveandothervariousfactors,therefore,masteringtheforceandstabilitychangesaftertheshipranagroundandchoosingthecorrectmeasuresfromshallowissignificantfortakingofftheshallowsmoothly.Thefollowinghavegiventhemethodsforcalculatingtheforceonthebottomandthepositi
7、onofthecenter,stilltherelationshipsbetweenthesupportingforce,thedepthatthesupportingpointandangleoftransverseinclinationaccordingtohydrostaticprinciplewhenpointorminorareagetsstranded,analyzedwithacaseexample,havegivenjudgebeingabletotakeadvantageofthattidetakingoff
