简介:Thispaperfocusesontheresearchofasemi-submersibleplatformequippedwithaDP-assistedmooringsystem.BasedontheworkingprinciplesoftheDP-assistedmooringsystemandthemodeloftheplatformmotion,atimedomainsimulationprogramisappliedtoanalyzetheimpact,inthecaseofonelinefailure,ontheplatformmotion,powerconsumptionofthethrustersandthetensionofthemooringlines.Theresultsshowthat,underthe10-yearwinddominant,aonelinefailurewillhavelittleimpactonthetensionofthemooringlines.Whenthefailurelineiswindward,thepowerconsumptionwillincreasegreatlywithaweakenedpositionofaccuracy.Howeverwhenthefailurelineisleeward,thepowerconsumptionwillbereducedwithapartlystrengthenedpositionofaccuracy.
简介:Forstudyingthedynamicperformanceofsubseaumbilicalcablelayingsystemandachievingthegoalofcabletensionandlayingspeedcontrol,therigidfiniteelementmethodisusedtodiscreteandtransformthesystemintoarigid-flexiblecouplingmulti-bodysystemwhichconsistsofrigidelementsandspring-dampingelements.ThemathematicalmodelofsubseaumbilicalcablelayingsystemkinematicchainispresentedwiththesecondorderLagrangeequationinthejointcoordinatesystem,anddynamicmodelingandsimulationisperformedwithADAMS.Thedynamicanalysisisconductedassumingthefollowingthreestatuses:ideallaying,practicallayingunderwavedisturbance,andpracticallayingwithtensioncompensation.Resultsshowthatmotiondisturbancesofthelayingbudgeunderseawaves,especiallywithheavingandpitching,willcauserelativelyseriousfluctuationsincabletensionandlayingspeed.Tensioncompensation,i.e.,activebacktensiontorquecontrolcanrestrictcontinuoustensionincreasingordecreasingeffectivelyandrapidly,thusavoidingcablebreachorbuckling.
简介:据Rystad能源发布的最新油田服务报告显示,当前石油市场的顺风顺势有望在2018年推动100个新的海上项目在全球获批.形成鲜明对比的是,2017年该数据仅为60,而2016年该数据更是不到40.报告显示,这100个项目代表了总计1000亿美元的资本投资,平均每个项目的投资金额大约达10亿美元.目前深水开发的平均盈亏平衡价格大约为每桶45美元,浅水开发则接近每桶30美元.在盈亏平衡价格方面,海上项目已经可以与一些二叠纪盆地(PermianBasin)的最佳项目竞争.随着美国页岩气价格的不断上涨,2018年和2019年,海上市场似乎将能胜过页岩气.
简介:有着“千年扶胥,丝路黄埔”美名的广州黄埔区坐拥众多历史文化资源.在21世纪海上丝绸之路建设中尚存在不足:政策落实和规划指引有待整合;基础设施和配套建设有待完善;资源投入和人才保障有待加强;海丝文化产业发展力度有待加强.为此,应积极探索“海丝文化”资源活化利用新形式:把握发展机遇,完善规划组织统筹;整合优势资源,打造特色旅游品牌;加强遗产保护,扩大“海丝”宣传影响;促进产业发展,壮大现代临港经济.通过上述措施,擦亮“海丝文化”品牌,主动参与21世纪海上丝绸之路建设,可极大推动黄埔区经济文化产业发展.