简介：在某多用途货船增设一台浮式起重机的情况下,文章以起重机底座加强结构为研究对象,采用有限元方法,建立起重机底座加强结构有限元模型,对非工作状态和最大工作状态两种情况进行强度评估,并以此为基础进行结构优化。结果表明,优化后起重机底座加强结构的强度足以保证起重机的安全作业。

简介：Theobjectiveofthisworkistoanalysefatiguereliabilityofdeckstructuressubjectedtocorrelatedcrackgrowth.Thestressintensityfactorsofthecorrelatedcracksareobtainedbyfiniteelementanalysisandbasedonwhichthegeometrycorrectionfunctionsarederived.TheMonteCarlosimulationsareappliedtopredictthestatisticaldescriptorsofcorrelatedcracksbasedontheParis-Erdoganequation.Aprobabilisticmodelofcrackgrowthasafunctionoftimeisusedtoanalysethefatiguereliabilityofdeckstructuresaccountingforthecrackpropagationcorrelation.Adeckstructureismodelledasaseriessystemofstiffenedpanels,whereastiffenedpanelisregardedasaparallelsystemcomposedofplatesandarelongitudinal.Ithasbeenproventhatthemethoddevelopedherecanbeconvenientlyappliedtoperformthefatiguereliabilityassessmentofstructuressubjectedtocorrelatedcrackgrowth.

简介：Inthisstudy,thepassageofwavesthroughpilegroupswithdifferentarrangementsisinvestigatedusingathree-dimensional(3D)numericalmodel.Forthesimulations,wavesofthreedifferentheightsof36,58,and81mm,afixedperiodof0.88s,andafixedwavelengthof1.128mwereused.Tosimulatethewavesandflowpatternthroughthepiles,Reynolds-averagedNavier–Stokes(RANS)equationsoffluidmotionweresolvedbasedonthefinitevolumemethod(FVM).Pilesweredefinedasobstaclesintherectangulardomainusingthefractionalarea/volumeobstaclerepresentation(FAVOR)method.Thevolume-of-fluid(VOF)andre-normalizationgroup(RNG)methodswereusedtosimulatethefreesurfaceandturbulencephenomenon,respectively.Byperformingdifferentnumericalsimulations,theeffectofcoastalpilearrangementsonwavepatternwasstudiedandwascomparedwithexistingexperimentaldata,andanacceptableagreementwasachieved.

简介：基于现有五体船船型运用Maxsurf建立了六种船首模型,考虑到结构强度是船舶实其他性能的前提,针对船体的结构强度进行了分析,引入有限元方法,对构建的五体船六种船首模型建立了导入方法,实现3D立体化展示.研究结果表明:设计的115°的船首倾角对整船结构强度最有利,而船首内倾130°时船体结构变形最大,最大应力也远大于其他船型,并且发现在船首直立与内倾130°之间存在一个对船体结构强度最有利的船首倾角.研究结果验证了模型的合理性及可行性.

简介：中国供给侧结构性改革大大改善了国内钢铁市场环境,并增加了中国对铁矿石海运进口的依赖,但未来进口仍面临着不确定因素。为了化解国内钢铁行业产能严重过剩的状况,2016年初中国开始实施＂供给侧结构性改革＂。根据《钢铁工业调整升级规划（2016-2020年）》,中国计划在2020年之前关停钢铁产能1.5亿吨。

简介：对子模型方法进行了详细的介绍，并以某舰用齿轮箱为计算模型，验证了冲击载荷下子模型方法计算舰船大型设备中的连接结构强度问题的有效性，其计算结果与常规计算方法的结果十分吻合．以某舰用齿轮箱为算例进行抗冲击计算，应用子模型方法对该齿轮箱连接构件进行了强度校核．计算结果表明，该齿轮箱的连接构件可以满足相关抗冲击要求，螺栓结构的动态响应特性与螺栓的连接形式有密切关系．研究结果对大型舰载设备连接构件的强度校核提供了新思路，具有一定的参考价值．

简介：以38万吨超大型矿砂船为计算对象,通过对舱段三维有限元结构建模方法、线外水压计算方法、舱内货物压力的计算方法以及端面施加弯矩等技术,形成了一种的超大型矿砂船舱段结构有限元强度校核的计算方法和评估体系,得出了船体甲板、外板、舷侧和舱壁等主要结构的应力,并真实地预报船体结构应力集中的区域,作为判断船体结构强度提供依据.也为后续的加强方案提供依据.

简介：分析构建中国航海人才知识结构的重要性及航海人才知识结构现状,从中国海运业发展方向入手,分析航海人才的知识需求,结合国家＂卓越工程师教育培养计划＂的要求,提出服务海洋强国战略的卓越航海人才知识的构成,并提出构建卓越航海人才知识结构的建议。

简介：利用Web服务方式建立船舶AIS数据网络服务,在比较成熟的基于角色访问控制模式（RBAC）基础上提出了AIS数据安全访问策略模型,设计了Web服务和接口系统的软件结构体系、系统组成体系和Web服务系统的接口功能,并选用J2EE5作为实现平台实现了Web服务和接口系统.

简介：水下机器人的研究与发展是科学技术进步的必然产物.本文设计了一种适用于浅水域进行多方面工作的框架形水下机器人,该整体方案突出了水下机器人结构简单、制作方便、制作成本低、安全性高.并综合考虑了相关部件的设置,保证其在水下工作时的良好性能.

简介：本文以92.5m客滚船为研究对象,通过对车辆甲板载荷的分析计算该船局部强度.在此基础上对车辆甲板结构提出3种改进措施,分析改进后甲板结构强度.借助模糊综合评判理论,对船体改进后3种方案通过建立因素集、建立因素权重、建立备择集、因素量化等过程分析最优方案.

简介：文章基于有限元建模软件FEMAP和后处理分析软件NASTRAN,对圆筒型钻井平台的海工吊底座及相关结构进行了分析建模,并按照8个工况对模型进行了加载,对其屈服强度、屈曲强度进行了校核,并进行了疲劳评估,具有一定的参考价值。

简介：Inthepresentwork,computationalsimulationswasmadeusingANSYSCFXtopredicttheimprovementsinfilmcoolingperformancewithdualtrench.Dual-trenchconfigurationconsistsoftwotrenchestogether,onewidertrenchandtheotherisnarrowtrenchthatextrudedfromthewiderone.Severalblowingratiosintherange(0.5:5)wereinvestigated.Thepitch-to-diameterratioof2.775isused.Byusingthedualtrenchconfiguration,thecoolantjetimpactedthetrenchwalltwotimesallowingincreasingthespreadingofcoolantlaterallyinthetrench,reducingjetvelocityandjetcompletelycoveredonthesurface.Theresultsindicatethatthisconfigurationincreasedadiabaticeffectivenessasblowingratioincreased.Thespatiallyaveragedadiabaticeffectivenessreached57.6%foratM=2.Noobservedfilmblow-offatallblowingratios.Theadiabaticfilmeffectivenessofdualtrenchcaseoutperformedthenarrowtrenchcase,laidbackfan-shapedhole,fan-shapedholeandcylinderholeatdifferentblowingratios.

简介：阐述高校“供给侧结构改革”对于“双一流”建设的助推作用,从师资队伍建设、国际化教育配套设施、海外校友基金会的利用、科技创新能力的激励力度等方面,分析高校“供给侧结构性改革”对于“双一流”建设的挑战,提出致力于一流师资队伍建设、完善教育配套设施、充分利用海外资金来源、提高高校创新能力方面的具体对策.

简介：Sloshingphenomenonintheliquidcargocarriershascaughttheattentionofresearchersastheinteractionbetweenthesloshingwavesandstructureisoneofthekeypointanddifficultyinthestudyofsloshing.Inthispaper,wecapturedthefreesurfacewithavolumeoffluid(VOF)methodandthencalculatedthemotionsandresponsesofthestructurebyadoptingtheReynolds-averagedNavier-Stokes(RANS)equationsforthewholefluiddomain.Withtheuseofuserdefinedfunctions(UDF)inFluent,theinteractionbetweenfluidandstructurewasthensimulated.Asareasonablesimplification,theauthorsstudiedtheresponseofasinglecantileverinatankundersloshingloads;Furtherstudyshouldpaymoreattentiontothemechanismsofinteractionbetweensloshingwavesandelasticstructures.

简介：文章阐明了PBL教学法在“船舶强度与结构设计”课程教学中的应用，介绍了其具体实施步骤。实施效果显示，该方法取得了良好的教学效果，具有一定的参考意义。

简介：Thispaperpresentsanimprovedunstructuredgridimmersedboundarymethod.Theadvantagesofbothimmersedboundarymethodandbodyfittedgridswhicharegeneratedbyunstructuredgridtechnologyareusedtoenhancethecomputationefficiencyoffluidstructureinteractionincomplexdomain.TheNavier-StokesequationwasdiscretizedspaciallywithcollocatedfinitevolumemethodandEulerimplicitmethodintimedomain.TherigidbodymotionwassimulatedbyimmersedboundarymethodinwhichthefluidandrigidbodyinterfaceinteractionwasdealtwithVOS(volumeofsolid)method.AnewVOScalculationmethodbasedongraphwaspresentedinwhichbothimmersedboundarypointsandcrosspointswerecollectedinarbitraryordertoformagraph.Themethodisverifiedwithflowpastoscillatingcylinder.

简介：Ananalyticalstudywaspresentedonactivecontrolofsoundtransmissionintoavibro-acousticenclosurecomprisingtwoflexibleplates.Twotypesofactuatorswereused,i.e.acousticactuatoranddistributedleadzirconatetitanatepiezoelectric(PZT)actuatorinsteadofpointforceactuator.Usingthemodalacoustictransferimpedance-mobilitymatrices,theexcitationandinteractioninthecoupledsoundtransmissionsystemcanbedescribedwithclearphysicalsignificance.Withthecontrolsystemdesignedtogloballyreducethesoundfield,differentcontrolsystemconfigurationswereconsidered,includingthestructuralactuatorontheincidentplate,actuatoronthereceivingplate,acousticactuatoronthecavity,andtheircombinations.Theeffectivenessandperformanceofthecontrolstrategycorrespondingtoeachsystemconfigurationwerecomparedanddiscussed.Theroleandcontrolmechanismofeachtypeofactuatorwereofparticularinterest.Itwasshownthattheincidentplateactuatoriseffectiveincontrollingthecavity-dominatedmodesandthestructuralmodesdominatedbytheincidentplateandreceivingplate.Twomaincontrolmechanismsareinvolvedinthiscontrolconfiguration,i.e.,modalsuppressingandmodalrearrangement.Forcontrolsystemconfigurationwithonlyacousticactuatorintheenclosure,themechanisminvolvedinthisarrangementispurelymodalsuppression.Desirableplacementsofstructuralactuatorsintermsoftotalpotentialenergyreductionwerealsodiscussed.

简介：思想政治理论课教育教学供给侧结构性改革,旨在调整教学方式方法,使教学要素实现最优配置,提高思想政治理论课的教学质量。激情课堂作为＂毛泽东思想和中国特色社会主义理论体系概论＂课的＂总结课＂,充分借鉴教育教学供给侧结构性改革的思路,创新教学方法,增强教学供给活力;践行教学理念,提高教学供给质量;探索教学供给理论,挖掘艺术教育的供给优势;点燃理论学习热情,实现教学供给目标。

简介：<正>Glasgow,UK18th-20thAugust2014AbouttheconferenceTheconferencewillbringtogetherresearchers,practitionerstoaddressthesafetyandreliabilityissuesasapplicabletodifferentstagesintheanalysis,designconstructionandin-servicelifeofmarinestructuressuchasship,offshore,submergedstructuresandtherenewableenergystructures.Thiswillinvolveadvancedanalysisbothforstrengthandloadmodelinordertoestablishsafetylevelbothfordeterministicmodel(WSDmethod)andforreliabilitybaseddesign(LRFDmethod).Oneoftheaimsofthedesignshouldbetoachieveadequatebutnotexcessivelevelofsafetywhichcanbesatisfiedthroughreliabilitybasedmethodandthistakesintoaccountuncertaintiesofdesignvariables.CurrentmoderncodesaretryingtoprovidedesignproceduresonLRFDformatalthoughnoexplicitreliabilityanalysisisdonetoarrivethesepartialsafetyfactors.Thisconferencewilldealwithalltheseissuesandseehowthesetechniquesareappliedtovarioustypesofmarinestructures.Glasgow,thevenueforthisconferenceisacitywhichhaslotofattractions.TheworldfamousLoch-LomondisonlyfewmilesawayandEdinburghis50minutesjourneybytrain.Thecitywillalsohostthe2014CommonwealthGames.