简介：这份报纸地址关节风波浪导致了在正常状态和差错事件下面的近海的漂浮风汽轮机(OFWT)调节的一种半类型的动态回答。在这份报纸的分析及时被进行领域，用aero-hydro-servo-elastic模拟代码--快。由于唯一粘滞参考书系统的特征，实现在的原来的粘滞的抑制模型快被二次的代替获得精确俘获粘滞效果。模拟盒子在静止的水里包含免费腐烂的运动，面对常规波浪稳定运动并且象处于有或没有风的运作的海状态的动态反应一样弯屈。模拟也包括盒子因为快片在紧急情况以后投球导致的短暂回答关机。在许多刺激下面的站台运动，本地结构的负担和典型绳索行紧张力量的特征被获得并且调查。

简介：钢夹克衫类型平台是普通类型近海组织，监视的健康是在他们的安全评价的一个重要问题。在现在的学习，一个新损坏察觉方法为这种结构被采用并且由一个实验室模型的使用试验性地检查了。方法为开发对测量和分析模型无常不太敏感的柔韧的损坏察觉技术被调查。为这个目的，有加权的属性(AISWA)的人工的免疫系统的加入模型更新被建议的方法进有限元素(FE)并且与为在损坏鉴定探索它的有效性的另外的方法相比。基于mimicking免疫者识别，噪音模拟和属性weighting，方法提供重要优点并且有高成功率。因此，当为在大土木工程的失败的察觉的一个合适的方法与复杂结构的几何学组织，它被建议，例如考虑案例研究。

简介：Themainintentionofthepresentstudyistoreducewind,wave,andseismicinducedvibrationsofjackettypeoffshorewindturbines(JOWTs)throughanewlydevelopedvibrationabsorber,calledtunedliquidcolumngasdamper(TLCGD).UsingaSimulink-basedmodel,ananalyticalmodelisdevelopedtosimulateglobalbehaviorofJOWTsunderdifferentdynamicexcitations.ThestudyisfollowedbyaparametricstudytoexploreefficiencyoftheTLCGDintermsofnacelleaccelerationreductionunderwind,wave,andearthquakeloads.StudyresultsindicatethatoptimumfrequencyoftheTLCGDisratherinsensitivetoexcitationtype.Inaddition,whilethegaininvibrationcontrolfromTLCGDswithhighermassratiosisgenerallymorepronounced,heavyTLCGDsaremoresensitivetotheirtunedfrequencysuchthatill-regulatedTLCGDwithhighmassratiocanleadtodestructiveresults.ItisrevealedthatawellregulatedTLCGDhasnoticeablecontributiontothedynamicresponseoftheJOWTunderanyexcitation.

简介：BaoshanIron&SteelCo.,Ltd.,(referredtoasBaosteel)inChinafirstsucceededindevelopingtheU-ing-O-ing-Expanding(UOE)longitudinalsubmergedarcweldedpipes(SAWLs)offshorelinepipeofamaximumthickness/outsidediameter(T/D)0.042in2011.DescribedinthispaperistheresearchanddevelopmentoftheX70UOESAWLpipesbythecompany.TheresultshowsthatthesaidX70linepipehasbeenincompliancewithrelevantrequirementsasspecifiedinSpecificationsDNV-OS-F101,andhasbeensuccessfullyusedintheSouthChinaSeadeepwatergaspipelineproject.

简介：In2010,thefirstoffshorewindturbinewithintegratedinstallationwasestablishedinQidongseaareaofJiangsuProvince,China,whichledtotheimplementationphaseofone-step-installationtechniquebasedonthedesignandconstructionoflarge-scalebucket-top-bearing(LSBTB)bucketfoundation.ThecriticaltechniqueofLSBTBbucketfoundationincludedself-floatingtowing,penetrationwithadjustmentofhorizontallevelness,removabilityandone-step-installation.Theprocessofone-step-installationincludedtheprefabricationofLSBTBbucketfoundationinonshoreconstructionbase,installationanddebuggingofwindpower,overallwatertransportationoffoundationandwindpowersystem,andinstallationoffoundationandoffshorewindturbineontheappointedseaarea.Thecostofone-step-installationtechniquewasabout5000Yuan/kW,whichwas30%-50%lowerthanthatoftheexistingtechnique.TheprefabricationofLSBTBbucketfoundationtookabouttwomonths.Duringtheone-step-installationprocess,theinstallationanddebuggingofwindpowerandoverallwatertransportationneedaboutonetotwodaysinseaareawithin35mdepth.Aftertheproposedtechniqueisindustrialized,thecostwillbefurtherreduced,andtheinstallationcapacityisexpectedtobeupto500windturbinesperyear.

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简介：TherelationbetweenearthquakesandactivefaultsinShanghaianditsadjacentoffshoreregionisquantitativelyevaluatedusingGIS-basedbufferandoverlayanalysistechniques.Statisticsonthedistancefromtheepicenterofanearthquaketoitsnearestactivefaultsuggestthatmostearthquakesinthestudyareaoccurredwithin10to20kmofmajoractivefaults.Thestrikesofactivefaultshavesignificantinfluencesontheoccurrenceofearthquakes.TheNE-NNE-strikedfaultsarelessactivethanNW-NNW-orEW-strikedfaults.AlongtheNW-NNW-orEW-strikedfaults,thefrequencyofearthquakesismuchhigherthanthatalongNE-NNE-strikedfaults.Thetimeoffaultactivityhassomedegreeofinfluenceontheearthquakes.Thenewerthefaults,thehigherthefrequencyofearthquakeswithinthezoneofthefaults.

简介：ThisarticleprognosticatesthehydrocarbongenerationpotentialofcoresamplesfromfieldsA,B,CandDinNigerdelta,Nigeria.Theobjectivesofthisstudyaretocharacterizethequalityofthesecoresamplesbyorganicgeochemicalanalyses.AtotaloftencoresamplescollectedfromfieldsA,B,CandDinNigerdeltawereanalyzedusingtotalorganiccarbon(TOC)contentanalysis,rock-evalpyrolysistechnique.Theanalyticalresultsofthestudiedcoresamplesrevealthattheyhavegenerallyhightotalorganiccarboncontents(TOC),suggestingthatconditionsintheNigerdeltafavourorganicmatterproductionandpreservation.ThereisavariationinthekerogentypesandthismaybeattributedtotherelativestratigraphicpositionsofthecoresampleswithintheNigerdelta.Therock-evalresultsindicatethatthesamplesfromfieldsCandDcontainpredominantlyTypeIIkerogenwithacapacitytogenerateoilandgasandhencehavegoodgenerativepotential.ThesamplesfromfieldsAandBcontainmainlyTypeIIIkerogenandaregas-pronewithmoderategenerativepotential.

简介：Decreasingtherisksandgeohazardsassociatedwithdrillingengineeringinhigh-temperaturehigh-pressure(HTHP)geologicsettingsbeginswiththeimplementationofpre-drillingpredictiontechniques(PPTs).ToimprovetheaccuracyofgeopressurepredictioninHTHPhydrocarbonreservoirsoffshoreHainanIsland,wemadeacomprehensivesummaryofcurrentPPTstoidentifyexistingproblemsandchallengesbyanalyzingtheglobaldistributionofHTHPhydrocarbonreservoirs,theresearchstatusofPPTs,andthegeologicsettinganditsHTHPformationmechanism.OurresearchresultsindicatethattheHTHPformationmechanisminthestudyareaiscausedbymultiplefactors,includingrapidloading,diapirintrusions,hydrocarbongeneration,andthethermalexpansionofporefluids.Duetothismulti-factorinteraction,acloudofHTHPhydrocarbonreservoirshasdevelopedintheYing-QiongBasin,butonlytraditionalPPTshavebeenimplemented,basedontheassumptionofconditionsthatdonotconformtotheactualgeologicenvironment,e.g.,Bellotti’slawandEaton’slaw.Inthispaper,wefocusontheseissues,identifysomechallengesandsolutions,andcallforfurtherPPTresearchtoaddressthedrawbacksofpreviousworksandmeetthechallengesassociatedwiththedeepwatertechnologygap.Inthisway,wehopetocontributetotheimprovedaccuracyofgeopressurepredictionpriortodrillingandprovidesupportforfutureHTHPdrillingoffshoreHainanIsland.

简介：从一个锰小瘤的层从菲律宾的海挖出(16°56′N，129°48′E；水深度，5700m)并且45个体积小瘤从近海Minami-Torishima岛，日本(23°3′N，153°22′E；水深度，1200m)化学上被分析，他们的起源基于geochemical限制被讨论。一般来说，，Cu，Ni，Zn和瞬间趋于与增加Mn内容增加元素(REE)少些显示出的公司，Pb，Ba，V，Sc，Th，和稀土元素有增加Mn内容的变化。来自菲律宾的海的小瘤42H有平均Mn/Fe比率结束到1并且显示出一个积极Ce异例，建议占优势的氢的起源。230Th前和230Th前/232在小瘤42H的外部∼0.3公里的Th比率显示∼1.7mm/Myr的稳定的生长率。小瘤E30从近海Minami-Torishima被更低的Mn，Fe，Mn/Fe(0.53)和Mo/V(0.2)比率描绘但是更高的P和Cu/Ni(0.31)相对来自那个区域的另外的小瘤的比率。E30的Ce内容是不平常地低的(82ppm)什么时候与来自区域和它的另外的小瘤相比是唯一的小瘤，与一个否定Ce异例(−0.64)分析了。把那个大多数基于我们建议的geochemical数据小瘤从近海除了E30，Minami-Torishima主要具有氢的起源，它被热水的输入，和E45统治，它关于35%热水的贡献有。

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简介：摘要：变频配电系统是海上钻采平台提高采收率的重要环节。变频控制柜内部包含逆变整流模块、进线电抗器、输出滤波器、断路器等功率器件，同时包含PLC、PROFIBUS-DP通讯卡、CI通讯卡、COM通讯卡、CANOPEN通讯卡等数据采集传输配件。PLC与通讯卡配合，将变频功率模块数据传输到触摸屏、中央控制柜及平台中控系统，使数据依据存储地址有序共享。中央控制系统按照PROFIBUS、TCP/IP或CANOPEN等通讯协议进行数据采集、分析及发送控制命令等工作。因各平台中央控制现场总线的通讯协议不同，控制柜内PLC的型号差异，变频功率模块接口不尽相同，导致变频控制系统工业现场总线的选型工作非常繁琐。本文设计了一种总线选型软件，输入功率模块型号及中央控制系统通讯方式后可自动生成总线选型清单，极大方便了总线选型的工作，提高了选型的准确性。

简介：摘要： 本文针对海上采油平台井下作业连续油管作业的常见类型进行了列举，结合海上平台的特点及常见作业的特点进行了可能出现的井控事件分析，对井控演习预案及应急逃生方案进行了研究。