简介：Mooringmodelexperimentandmooringlinetensiondeterminationareofsignificancetothedesignofmooringsystemsandberthingstructures.Thispapermainlyinvolves:(a)descriptionandanalysisofamooringmodelexperiment;(b)derivationofstaticequilibriumequationsforamooredshipsubjectedtowind,currentandwaves;(c)solutionofmo.oringequationswiththeMonteCarlomethod;(d)qualitativeanalysisofeffectsofpierpilesonmooringlineforces.Specialemphasisisplacedonthederivationofstaticequilibriumequations,solutionmethodandthemooringmodelexperiment.

简介：Aninnovativefloatingmooringsystemwithtwoormoreindependentfloatingmooringplatformsinthemiddleandonerigidplatformoneachsideisproposedforimprovingefficiencyandsafetyinshallowwater.Forthisnewsystem,mostofcollisionenergyisabsorbedthroughthedisplacementoffloatingplatforms.Inordertoillustratethevalidityofthesystem,aseriesofmodeltestswereconductedatascaleof1:40.Thecoupledmotioncharacteristicsofthefloatingmooringplatformswerediscussedunderregularandirregularwaves,andtheinfluencesofwavedirectionandothercharacteristicsondynamicresponseofthesystemwereanalyzed.Theresultsshowthatthemooringsystemissafestat0°ofwaveincidentangle,whereasthemostdangerousmooringstateoccursat90°ofwaveincidentangle.Motionresponsesincreasewiththeincreaseofwaveheight,butarenotlinearlyrelatedtochangesinwaveheight.

简介：Tounderstandthemooringenergyduringpositioning,theexpressionsoffouritemsconcerningmooringlineenergyarepresentedbasedonafiniteelementmodel,includinggravitationalandelasticpotentialenergy,kineticenergyanddissipatedenergyduetomooring-induceddamping.Inastaticcase,theforcecalculatedfromthederivativeofpotentialenergywithrespecttodistanceiscomparedwiththatofdirectcalculation.Theresultsarefoundfitwell,whichindicatesthelawofconservationofenergyandalsoshowsthecorrectnessofthepotentialenergyresults.Forthecasesofasinglemooringlinewiththeattachmentpointoscillatingwithdifferentamplitudesinhorizontalorverticaldirection(correspondingtosurgeandrollmotionsrespectively),andthecaseofthemooringlinewithahorizontalbichromaticoscillationontheattachmentpoint,thetimehistoryofthefirstthreeitemsarecalculatedandanalyzed,also,theindicatordiagramformooring-induceddampingaregiven.Theseresultsrevealtheenergystateofthemooringlineandcanprovideabetterunderstandingofhowthemooringlineworks.

简介：Tofulfiltheneedofdevelopmentofoffshoreoilfloatingproductionsystem,theperformanceofturretassemblyinaninboardturretmooringsystemhasbeeninvestigatedinthepaper.Bymeansofsystematicevaluation,theoptimalstructureoftheturretforsingle-pointmooringsystemshasbeendetermined.Throughmodeltestsofaturretmooringsystem,severalgroupsofdatasuchasforces,momentsanddisplacementsunderdifferentenvironmentalconditionshavebeenobtained.Stressesandstrainsoftheturretstructurehavebeencalculatedbymeansofthefiniteelementmethodcorrespondingtothesituationinthemodelexperiment.Thestudyshowsthattheselectedturretstructureandthedesignedturretassemblyaretechnicallyfeasible.

简介：以便改进一个卸载的系统的安全性质与(SBS)一起在FPSO被一个蛋黄系统在BZ25-1的域里在哪个系在系在，分析那些性质是必要的。根据类似的工程的经验，拖引不同卸载的策略安排被使用3-D放射/衍射理论和伪静电干扰时间领域方法估计他们的各自的安全性质讨论。通过不同安排比较的安全评价分析，改进与一起系在卸载系统的安全性质的各种各样的方法被在系在的线和fender偏转分析紧张验证。通过比较，由适当地扩大关键因素，包括象大索的数字一样的fenders和大索的尺寸，更好的安全表演能被完成，这能被结束。

简介：Multi-componentmooringsystemsbecomewidelyusedindeepwaterposition-keepingofdrillingandproductionplatforms.However,versatilematerialsmakeitdifficulttodesignappropriatemooringlinesmadeofseveralsegments.Basedoncatenaryequationsofamulti-componentmooringlineataspecificwaterdepth,thispaperestablishesaminimummodelfordesigningthiskindoflines.ThemodelissolvedbyGeneticAlgorithmandMulti-ObjectivePlanningrespectively.Themodelisverifiedbyitsapplicationtoapracticalmooringdesignassignment-aquasi-staticanalysisforalargesemi-submersible.Theoptimalresultisfinallyobtainedwiththeaidofdesigngraphs.

简介：Theinternalturretmooringsystemforoilproductionstoragevesselsisadevelopingtypeofoffshorefloatingproductionsystemsuitablefordeepwaterandharshenvironmentalapplication.Inthispaper,someachievementsinourresearchworkarepresented.Thedescriptionincludes:dynamicanalysisofmooringsystem,researchonperformanceofturretassembly,influenceofvesseldimensionsandhullformsonmooringperformance,modeltestsundercombinedactionofenvironmentalforcesinbasin,andhullstructuralstrengthanalysis.

简介：Thisstudyhasfocusedondevelopingnumericalproceduresforthestaticanddynamicnonlinearanalysisofmooringlines.AgeometricallynonlinearfiniteelementmethodusingisoparametriccableelementwithtwonodesisbrieflypresentedonthebasisofthetotalLagrangianformulation.Thestaticanddynamicequilibriumequationsofmooringlinesareestablished.Anincremental-iterativemethodisusedtodeterminetheinitialstaticequilibriumstateofcablesystemsundertheactionofselfweights,buoyancyandcurrent.AlsotheNewmarkmethodisusedfordynamicnonlinearanalysisofoceancables.Numericalexamplesarepresentedtovalidatethepresentnumericalmethod,andexaminetheeffectofvariousparameters.

简介：系在的系统为钻在的半能沉入水中的钻塔起一个重要作用深海。详细分析在进行了很好在2009在华南海在一个深海的地点钻的试用的一个半能沉入水中的钻塔的绳索上被执行。钻塔是30岁并且与457m的设计的最大的操作的水深度有一个浅平台。后面的系在分析，一个系在的图案被给那要求钻塔原版绳索系统升级。升级包括了几革新，例如安装八个更大的锚，即代替原来的锚并且插入一另外有存在的链的钢电线的600m。所有这些被做为在职务要保持进行在476m的水深度钻的钻塔提高钻塔的系在的能力。钻的全面持续时间是50天和证明在当它在华南海正在钻试用很好时，达到使钻塔静止的目标有效的升级的绳索系统。这个成功的运动证明一个更旧的半能沉入水中的钻塔能雇用在小心的设计并且到原来的绳索系统的合适的升级和修正以后在深水里钻。

简介：137个内部独居的波浪(ISW)的一个总数在从三月吕宋岛海峡(LS)向西在深盆进行到2010年8月的一个地实验期间被捕获。系在的观察表明充分发达的ISW向西拥有最大值超过1.8m/s和大约200m的一个振幅的速度。在华南海(SCS)的ISW在7月是很活跃的，它可能由于在夏天的强壮的层化。大多数ISW事件被检测在附近并且在第一or以后第15月亮的白天，显示在SCS的ISW被天文的潮触发。观察ISW的半部分在19:00本地人时间附近被检测，它能被事实解释那种类型--ISW出现在晚上在粗略地一样的时间每天。在Batan岛的区域南方可能是类型的主要来源区域的LS表演的ISW和天文的潮的繁殖方向--ISW，当Itbayat岛的区域南方和Batan岛的南方是可能的时，type-bISW的主要来源区域在系在观察了。而且为在LS从双山脉射出的半天的内部潮的回声，在水下Itbayat岛的山脉南方和Batan岛的南方被相信赞成精力充沛的ISW的产生。

简介：作为一种干净、可更新的精力，潮汐的当前的精力与变得越来越严重的精力和环境问题的缺乏在整个世界正在变得日益普及。漂浮潮汐的当前的发电站是能支撑大量风，波浪，和水流的潮汐的当前的力量变压器的一种典型类型，并且弄平台风的极端状况。因此，系在的系统一定是足够可靠的让车站通常操作并且处于极端状况幸存。在这份报纸检验的发电站在40m的深度被安装。44公里直径R4-RQ4链被选择，与2147kN最小裂缝力量和50kN虚荣。普通无饰钉的连接链在这份报纸被使用。把累积损坏统治，链的S-N曲线，和摩西软件基于矿工疲劳，一个高度可靠的绳索系统被设计并且分析。系在的系统设计了的计算结果表演在整个一个10年的时期是可靠的。它能完全满足美国石油机构(API)的设计要求。因此，介绍研究为推进这种发电站的设计是重要的。

简介：这篇论文集中于与一个帮助DP的绳索系统装备的一个半能沉入水中的平台的研究。基于帮助DP的绳索系统的工作原则和平台运动的模型，一个时间域模拟程序被使用分析影响在一线失败的情况中，在平台运动上，驱动推进器和系在的线的紧张的消费。结果显示出那，在10年的风下面主导，一线失败几乎没在系在的线的紧张上有很少影响。当失败线是上风的时，电源消费将与精确性的一个削弱的位置极大地增加。然而失败线是什么时候下风，电源消费将与精确性的一个部分加强的位置被减少。

简介：Theglobalresponsesofaninnovativedeepdraftplatformareinvestigatedusingcatenary,semi-taut,andtautmooringmodels,respectively.Thethreemooringsystemshavethesamearrangementsandsimilarstaticrestoringforcecharacteristics.Thedynamiccouplingeffectsbetweentheplatformandthemooringsystemsarecalculatedinthetimedomain.Free-decayand3-hsimulationsareconductedunder1-yearand100-yearreturnperiodenvironmentalconditionsintheSouthChinaSea.Themooringdampingcontributions,theresponsecharacteristics,andthemooringlinetensionsareinvestigated.

简介：Thechain/wirerope/chaincombinationisacommonchoiceformooringoffshorefloatingplatforms.However,dataofthedragcoefficientsofchainlinksareratherlimited,resultinginuncertaintieswiththecalculationsofthedragforce,andhencethedampingofthemooringsystem.Inthispaper,theimportanceoftheselectionofthedragcoefficientisfirstinvestigated.Thecomputationalfluiddynamics（CFD）methodisthenusedtodeterminethedragcoefficientsofastudlesschainundersteadyflows.Numericalmodelvalidationisfirstcompletedbysimulatingasmoothcircularcylinderundersteadyflows.Inparticular,theperformanceofdifferentturbulencemodelsisassessedthroughthecomparisonsbetweenthecalculationsandtheexperimentalresults.Thelargeeddysimulation（LES）modelisfinallyselectedforthesimulationofsteadyflowspastachain.TheeffectsoftheReynoldsnumberonthedragcoefficientofastud-lesschainisalsostudied.Theresultsshowthatthecalculateddragcoefficientsofastud-lesschainarefairlyconsistentwiththeavailableexperimentaldata.

简介：目前，相等的水深度截断了系在的系统优化设计被认为是混合模型为深海平台测试的优先级，并且以后将代替完整的深度系统测试。与完整的深度系统相比，工作深度和跨度在截断的那，和另外的特征是更小的也维持更多的一致性。在这篇论文，一辆内部战车系在漂浮在320m的水深度工作的生产存储与卸载的系统(FPSO)，当截断的水深度是80m时，被选择是一个研究例子。而且，一改进非统治的排序基因算法(INSGA-II)被选择最佳地计算相等的水深度，截断了系统在水平、垂直的方向，以及静电干扰的全部的绳索系统的压力条件代表性的单身者的典型类似绳索线。数字计算的结果显示数学模型是可行的，并且优化方法快、有效。

简介：浮标系统的推广是为浮标系统的操作的最重要的过程之一。在现在的学习，包含表面浮标的一个单个点的绳索浮标系统，有部件的电报片断，锚被使用多身体动力学等等建模方法。运动方程在分离节点描述和充分笛卡儿的坐标被开发。然后数字的方法被用来解决平常的微分方程，当锚从董事会正在扔时，动力学模拟被完成。没有电流并且与在浮标系统的电流的不同节点的轨道和速度被获得。电缆线的每部分的短暂紧张力量在推广的进程被分析。当锚正在摸海床和力量将与不同漂浮配置改变的最大的紧张时，数字结果显示短暂收费载重增加到山峰价值。这个工作对浮标系统计划的设计和推广有用。

简介：Adesignofsemi-submersibleplatformismainlybasedontheextremeresponseanalysisduetotheforcesexperiencedbythecomponentsduringlifetime.Theexternalloadscaninducetheextremeairgapresponseandpotentialdeckimpacttothesemi-submersibleplatform.Itisimportanttopredictairgapresponseofplatformsaccuratelyinordertocheckthestrengthoflocalstructureswhichwithstandthewaveslammingduetonegativeairgap.Thewindloadcannotbesimulatedeasilybymodeltestintowingtankwhereasitcanbesimulatedaccuratelyinwindtunneltest.Furthermore,fullscalesimulationofthemooringsysteminmodeltestisstillatuffworkespeciallythestiffnessofthemooringsystem.Owingtotheabovementionedproblem,themodeltestresultsarenotaccurateenoughforairgapevaluation.Theaimofthispaperistopresentsensitivityanalysisresultsofairgapmotionwithrespecttothemooringsystemandwindloadforthedesignofsemi-submersibleplatform.Thoughthemodeltestresultsarenotsuitableforthedirectevaluationofairgap,theycanbeusedasagoodbasisfortuningtheradiationdampingandviscousdraginnumericalsimulation.Inthepresenteddesignexample,anumericalmodelistunedandvalidatedbyANSYSAQWAbasedonthemodeltestresultswithasimple4linesymmetricalhorizontalsoftmooringsystem.Accordingtothetunednumericalmodel,sensitivityanalysisstudiesofairgapmotionwithrespecttothemooringsystemandwindloadareperformedintimedomain.Threemooringsystemsandfivesimulationcasesaboutthepresentedplatformaresimulatedbasedontheresultsofwindtunneltestsandsea-keepingtests.Thesensitivityanalysisresultsarevaluableforthefloatingplatformdesign.

简介：Thecoupledhull,mooringandriseranalysistechniquesintimedomainarewidelyrecognizedastheuniqueapproachtopredicttheaccurateglobalmotions.However,thesecomplexissueshavenotbeenperfectlysolvedduetoalargenumberofnonlinearfactors,e.g.forcesnonlinearity,mooringnonlinearity,motionnonlinearityandsoon.Thispaperinvestigatesthecoupledeffectsthroughthenumericaluncoupledmodel,mooringcoupledmodelandfullycoupledmodelaccountingmooringandrisersbasedonanoveldeepdraftmulti-sparwhichisespeciallydesignedfordeepwaterin2009.Thenumericalstatic-offset,free-decay,wind-actiontestsareexecuted,andfinallythreehourssimulationsareconductedunder100-yearreturnperiodofGOMconditionsinvolvingwave,windandcurrentactions.Thedampingcontributions,responsecharacteristicsandmooringlinetensionsareemphaticallystudied.