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ID:32058768
大小:2.83 MB
页数:70页
时间:2019-01-31
《基于极限承载能力的江海直达船中剖面结构优化分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、武汉理工大学硕士学位论文AbstractBecauseofitsadvantagesinbusinesscyclesandeconomic,theresearchonthestructureoptimizationofriver-to-seashipsisbecomingahotissue.Basedondiscussionandreviewofultimatestrengthofshiphullsandoptimizationmechanismandimplementationmethodofhull
2、structures,thispapertakestheweightofmidshipsectionstructureofariver-to-seashipastheoptimizationgoal.Inaccordancewith‘River-to-SeaConstructionSpecifications’,optimizationstrategyandimplementationappliedforthestructureoptimizationofriver-to-seashipsisstudi
3、edwithpresentmatureoptimizationdesignplatformwhichisbasedontheultimatestrength.Themaincontentsandresultsareasfollows:(1)Bymeansofthestudyofultimatestrengthcalculationmethods,thispaperusessimplifiedandnonlinearfiniteelementmethodastheultimatestrengthcalcu
4、lationmethod,andintroducesthecalculationprocessofsimplifiedmethodindetail.Accordingtothecharacteristicsofshipstructuresandexistingresearchachievementsofstructureoptimization,simulatedannealingalgorithmisselectedasoptimizationalgorithm.Thecalculationandan
5、alysisofoptimizationmodeliscompletedbyoptimizationdesignplatformIsight.(2)Basedontheprincipleofsimplifiedcalculationmethodofultimatestrength,thesimplifiedprogramiswroteusingFortranlanguage.Thisarticlecompletesthefactorsanalysisofthegrillagestructureunitu
6、singthesimplifiedprograminadvance.Throughthecomparisonoftheoryandresultsofdifferentmethodsofdesignofexperiments,OptimalLatinhypercubedesignischosenforsamplingandsensitivitystudy.Thestructureelementsofmidshipsectionofriver-to-seashipsareanalyzed.Takingthe
7、resultoffactorsresearchofgrillagestructureunitintoconsideration,thedesignvariables,constraintsandobjectiveoftheoptimizationofmidshipsectionstructuresareconfirmed.Then,thesensitivitiesofmidshipsectionstructuresarecalculated.Accordingtothesensitivityresult
8、s,thispapereliminatessomevariablesandmakesthepreliminaryoptimizationcalculation.(3)Basedontheparametricthought,thisarticleestablishesthemodelofparametricfiniteelementmodelingandcalculationforthemidshipsectionstructuresIII万
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