简介：

简介：Globalstrengthisasignificantitemforfloatingproductionstorageandoffloading（FPSO）design,andsteelweightplaysanimportantroleinthebuildingcostsofFPSO.Itisthemaintasktoconsiderandcombinethesetwoaspectsbyoptimizinghulldimensions.Therearemanyoptionalmethodsfortheglobalstrengthanalysis.AcommonmethodistousetheABSFPSOEaglesoftwaretoanalyzetheglobalstrengthincludingtherulecheckanddirectstrengthanalysis.AndthesamemethodcanbeadoptedfortheFPSOhulloptimizationbychangingthedepth.Aftercalculationandoptimization,theresultsarecomparedandanalyzed.Theresultscanbeusedasareferenceforthefuturedesignorquotationpurpose.

简介：矩形的瓦能为保护在轮船壳上被生，但是瓦的方面必须被调整因此邻近的瓦将遵循壳的弯曲。为沿着一根参考线放瓦的一个方法被建议，并且为瓦的四个顶点的排水量的一个许可的范围是坚定的。一根特定的参考线上的每瓦的变丑然后被获得。瓦什么时候是到有最少的弯曲的一根线的放的平行，被发现最少的变丑被要求。在在表面上计算吝啬的弯曲以后，表面被划分成三个布局区域。跟随主要弯曲的最少的变丑的一套分离的点被获得。一条NURBS插值曲线然后为放瓦作为参考线被阴谋。瓦的最佳尺寸被获得，给许可的最大的变丑条件。这最小化螺栓的数字和填满的数量。一典型在船尾，壳节被选择并且基于弯曲的分发划分了成三个布局区域。矩形的瓦的最佳尺寸为每个布局区域被获得，他们然后在表面上被生。这样，矩形的瓦的布局能被阴谋。

简介：Theparametricapproachtodesignofhullformwasstudiedinthiswork,whichprovidesthemeansforquickgenerationandvariationofhullformforthehydrodynamicoptimizationofhullform.

简介：ＡＮＥＷＣＯＮＶＥＸＨＵＬＬＡＬＧＯＲＩＴＨＭＦＯＲＡＮＹＰＯＬＹＧＯＮＨｕＺｈａｎｑｉＬｉＹｕｐｅｎｇＷａｎｇＪｕｎＱｉａｏＬｅｉＡｂｓｔｒａｃｔＡｎｅｗａｌｇｏｒｉｔｈｍｆｏｒｆｉｎｄｉｎｇｃｏｎｖｅｘｈｕｌｏｆａｐｏｌｙｇｏｎｉｓｐｒｏｐｏｓｅ...

简介：Theresearchonunderwatership-hullcleaningrobotwasconductedonthepurposeofrealizingtheautomationofcleaningunderwatershiphullsothatservicelifeofshipwillbeprolongedandshipspeedwillraised.Moreover,fuelconsumptionandtheworkintensityofdiverswillbereduced.Inthispaper,thecurrentsituationandthelatesttechnologyinChinaandabroadwereanalyzed;meanwhile,thetypicalcharacteristicsoftheunderwatercleaningrobotwereintroduced.Accordingtotheworkprincipleoftheunderwatercleaningrobot,theemphasiswasputontheanalysisandstudyofpermanent-magneticabsorption,magneticwheel,airproofandanticorrosion,underwatercleaningequipmentandcontrolsystem.Therobotiseasyinrotationandsimpleincontrol.

简介：Duetotheinteractionbetweenthemainhullandsidehulls,differentlayoutsandlengthsofsidehullsaffectthewaveloadssignificantly.Basedonthree-dimensionalpotentialtheoryandGreen'sfunction,thisarticlegivesthesignificantvaluesforwaveloads,includingverticalshearforcesandverticalbendingmomentsatdifferentlocationsonthemainhull,andtransversebendingmomentsatthejunctionofthecrossstructureandmainhull.Inaddition,aparametricoptimizationofwaveloadsfordifferentlayoutsandlengthsofsidehullswereperfomed.Severalspeedsandwaveheadingswerealsoconsidered.Finally,spectralanalysiswasconductedtoattainloaddistribution.Theconclusionsofthisstudyareconducivetothedesignandoptimizationofthisnewtypeofship.

简介：在借精确集成方法的想法以后，一个精确集成转移矩阵方法(PITMM)被修改传统的转移矩阵方法建议。海底的壳能是加入了conicalcylindrical球形的壳被建模。由考虑ring-stiffeners的效果，革命的壳的地转移矩阵被PITMM精确地获得。在装配地转移矩阵进一个全部矩阵以后，动态模型被建立解决加入的壳的动态回答。由由修改波浪重叠方法(MWSM)在液体描述健全压力并且沿着加入的壳的顶点线并置点，最后，有限的使硬的海底的壳的结构、声学的回答能被联合PITMM和MWSM预言。现在的方法的有效性被把球形的壳的结构、声学的回答与存在结果作比较验证了。而且，海底的壳的结构、声学的回答上的模型截断，僵硬和厚度的效果被学习。

简介：Hydrodynamicoptimizationofthehullformscanberealizedthroughtheimplementationandintegrationofcomputationaltoolsthatconsistofahydrodynamicmodule,ahullsurfacerepresentationandmodificationmodule,andanoptimizationmodule.Inthepresentpaper,anewbulbousbowgenerationandmodificationtechniquehasbeendevelopedandintegratedintothehullsurfacerepresentationandmodificationmodule.Aradialbasisfunctionbasedsurrogatemodelisdevelopedtoapproximatetheobjectivefunctionsandreducethecomputingcost.Amulti-objectiveartificialbeecolonyoptimizationalgorithmisimplementedandintegratedintotheoptimizationmodule.Toillustratetheintegratedhydrodynamicoptimizationtools,acargoshipisoptimizedforreduceddrag.Theoptimalhullformsobtainedarethenvalidatedcomputationallyandexperimentally.Validationresultsshowthatthepresenttoolscanbeusedefficientlyandeffectivelyinthesimulationbaseddesignofthehullformsforreduceddrag.

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简介：Inthispaper,addedresistancesactingonahullofnonballastwatership（NBS）inhighwavesisdiscussed.ThenonballastwatershipsweredevelopedatthelaboratoryoftheauthorsatOsakaPrefectureUniversity,Japan.Inthepresentpaper,theperformancesofthreekindsofbowshapesdevelopedfortheNBSweretheoreticallyandexperimentallyinvestigatedtofindthebestoneinhighwaves.Inpreviouspapers,anoptimumbowshapefortheNBSwasdevelopedincalmwaterandinmoderatedwaves.Fora2mmodelforexperimentsandcomputations,thewaveheightis0.02m.Thismeansthatthewaveheightis15%ofthedraftoftheshipinfullloadconditions.Inthispaper,addedresistancesinhighwavesupto0.07mfora2mmodelor53%ofthefullloaddraftareinvestigated.Insuchhighwaveslinearwavetheorieswhichhavebeenusedinthedesignstageofashipforalongtimemaynotworkwellanymore,andexperimentsaretheonlyeffectivetooltopredicttheaddedresistanceinhighwaves.Withthecomputationsforwaves,theshipisinafullycapturedconditionbecauseshorterwaves,λ/Lpp〈0.6,areassumed.

简介：Sincetrimandsinkagearesignificantwhilevesselsareadvancingforwardwithhighspeed,thepredictedvesselresistancebasedonrestrainedmodeltheoryorexperimentmaynotberealresistanceofvesselsduringvoyage.Itisnecessarytotaketheinfluenceofhullgestureintoaccountfororedictingtheresistanceofhigh-speedship.Inthepresentworktheresistanceproblemofhighspeedshipistreatedwiththeviscousflowtheory,andthedynamicmeshtechniqueisadoptedtocoincidewithvariationofhullgestureofhighspeedvesselonvoyage.ThesimulationofthemodelsofS60shipandatrimaranmovingintowingtankwithhighspeedareconductedbyusingtheabovetheoryandtechnique.Thecorrespondingnumericalresultsareingoodagreementwiththeexperimentaldata.Itindicatesthattheresistancepredictionforhighspeedvesselsshouldtakehullgestureintoconsiderationandthedynamicmeshmethodproposedhereiseffectiveincalculatingtheresistanceofhighspeedvessels.

简介：动态僵硬矩阵方法被使用在这篇论文计算壳girder的颤动。这个方法不能仅仅简化计算模型，而且精确地得到高得多的频率和回答。为横向的颤动的一根Timoshenko横梁的动态僵硬矩阵的分析表情在这篇论文被介绍。旋转惯性的所有效果并且砍变丑在明确的表达被考虑。结果与Wittrick威廉算法相结合的动态僵硬矩阵被用来计算自然频率和299,500DWTVLCC的模式形状，然后震动的回答被模式重叠方法解决。计算结果与从另外的近似方法和实验获得的那些相比，并且它显示方法精确、有效。

简介：Numericalinvestigationwasconductedonanairshipofhull-finconfigurationforaerodynamicandaeroelasticcharacteristicsinthree-dimensionalviscousflows.Themathematicalmodelwasbuiltandthecorrespondingnumericalcodewasdevelopedforthefluid-structureinteractionproblem.ThegoverningequationsoftheviscousflowwithLL-LowReynoldsmodifiedmodelweresolvedbythestandardSIMPLEalgorithmbasedonthefinitevolumemethod.Afluid-structurecoupledmethodwasemployedtosolvethenonlinearaeroelasticityproblemfortheairship.Thecomputationalresultsoftheviscousflowareingoodagreementwiththeexperimentalmeasurements.Thesimulationontheaeroelasticbehavioroftheairshipinatrimmedflightrevealstheeffectofstructureflexibilityontheaerodynamicperformance.

简介：BasedonGreen’stheorem,atimedomainnumericalmodelwasconstructedtosimulatewavemakingphenomenoncausedbyamovingship.Inthisarticle,theRankinesourcesanddipoleswereplacedonboundarysurfaces(i.e.,theshipsurfaceandfreesurface),andatime-steppingschemewasemployed.Itsuniquecharacteristicisthatsteadystatecanberealizedfrominitialvaluebyemployingthetime-steppingschemeandunsteadyfreesurfaceconditions.Intimedomain,iftheresultsofunsteadyflowproblemtendtodatastabilizationaftermanytimestepsofcomputation,theycouldberegardedasthedataofsteadyones.Thismodelcouldbeemployedtosteadyorunsteadyproblems.Theoreticalreasoningandcomputationalprocessofthismethodwasdescribedindetail.Thelinearandnonlinearboundaryconditionsonbodysurfacewerestudied,andtherelativemeanstorealizetheseboundaryconditionsiniterativecomputationwerealsodiscussed.SomeproperparametersaboutthemodeloftheWigleyhullweredeterminedbymanynumericaltests,andtheirinfluencesonwavemakingresistanceandwavepatternwerediscussed.Accordingtothecomparisonbetweennumericalresultsanddataavailableinrelativereferences,themethodusedinthisworkisproventobeareliablemethodintimedomain.Andthelatticereorganizationineverytimestepcomputationisafeasiblenumericalapproach.

简介：有扭曲的壳的异种在米饭(OryzasativaL.)的一张繁殖人口被发现。异种除了扭曲的壳显示出更少的谷物重量和劣等的谷物质量。基因分析显示异种的显型被单个后退的基因控制(暂时指定了为TWH)。印射TWH基因，一张F2人口被穿过twh异种到R725产生，有正常的壳的一个indica米饭变化。为bulkedsegregant分析，变异的植物的体积被从10扭曲壳植物混合植物织物的相等的数量准备，正常植物的体积被分享10正常壳的植物的相等的数量织物获得。207份简单顺序重复(SSR)教材，在12个米饭染色体上分布式，被用于父母和二体积的多型性分析。TWH地点开始在染色体2上近被印射到SSR标记RM526。因此，进一步印射在标记RM526附近用50份SSR教材被执行。TWH在在1.4厘米的基因距离的染色体2和2.7的长手臂上在SSR标记RM14128和RM208之间被限定厘米分别地。这些结果为进一步好的印射提供基础，克隆并且TWH基因的功能的分析。

简介：Theshiphullsurfaceoptimizationbasedonthewaveresistanceisanimportantissueintheshipengineeringindustry.Thewaveletmethodmayprovideaconvenienttoolforthesurfacehulloptimization.Asapreliminarystudy,weusethewaveletmethodtooptimizethehullsurfacebasedontheMichelwaveresistanceforaWigleymodelinthispaper.Firstly,weexpressthemodel’ssurfacebythewaveletdecompositionexpressionsandobtainareconstructedsurfaceandthenvalidateitsaccuracy.Secondly,werewritetheMichelwaveresistanceformulainthewaveletbases,resultinginasimpleformulacontainingonlytheshiphullsurface’swaveletcoefficients.Thirdly,wetakethesewaveletcoefficientsasoptimizationvariables,andanalyzethemainwaveresistancedistributionintermsofscalesandlocations,toreducethenumberofoptimizationvariables.Finally,weobtaintheoptimalhullsurfaceoftheWigleymodelthroughgeneticalgorithms,reducingthewaveresistancealmostbyahalf.Itisshownthatthewaveletmethodmayprovideanewapproachforthehulloptimization.

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简介：ＡＣＯＵＮＴＥＲ－ＥＸＡＭＰＬＥＴＯＡＦＡＳＴＡＬＧＯＲＩＴＨＭＦＯＲＦＩＮＤＩＮＧＴＨＥＣＯＮＶＥＸＨＵＬＬＯＦＡＳＩＭＰＬＥＰＯＬＹＧＯＮＧｏｄｆｒｉｅｄＴｏｕｓｓａｉｎｔＡＣＯＵＮＴＥＲ－ＥＸＡＭＰＬＥＴＯＡＦＡＳＴＡＬＧＯＲＩＴＨＭＦＯＲＦＩ...

简介：为在米饭的壳硅内容的QTLqHUS6以前位于米饭染色体6的短手臂。由使用在在一个isogenic背景怀有qHUS6的RM587RM19784区域分离的一张F2:3人口，为壳硅内容的二QTL被检测，哪个qHUS6-1在对着丝点近似的区域位于远侧的区域和qHUS6-2。在目标区域带小异质接合的片断的三米饭植物被选择，哪个二盖住qHUS6-1区域，其它盖住qHUS6-2区域。三张F2:3人口分别地从三植物的selfed种子被导出。印射的QTL用在qHUS6-1区域分离的二张人口被执行，并且qHUS6-1被标记RM510和RM19417限定到147.0-kb区域flanked。有在qHUS6-2区域的不同genotypic作文的五组F3线从另外的F2:3人口被选择。二QTL用双向ANOVA，qHUS6-2a位于RM19706RM19795和qHUS6-2b在间隔RM314RM19665定义的间隔被分开。