简介:Thispaperfocusesontheresearchofasemi-submersibleplatformequippedwithaDP-assistedmooringsystem.BasedontheworkingprinciplesoftheDP-assistedmooringsystemandthemodeloftheplatformmotion,atimedomainsimulationprogramisappliedtoanalyzetheimpact,inthecaseofonelinefailure,ontheplatformmotion,powerconsumptionofthethrustersandthetensionofthemooringlines.Theresultsshowthat,underthe10-yearwinddominant,aonelinefailurewillhavelittleimpactonthetensionofthemooringlines.Whenthefailurelineiswindward,thepowerconsumptionwillincreasegreatlywithaweakenedpositionofaccuracy.Howeverwhenthefailurelineisleeward,thepowerconsumptionwillbereducedwithapartlystrengthenedpositionofaccuracy.
简介:9月9日晚,中国远洋发布公告称,中国远洋控股股份有限公司下属中远资产管理有限公司的下属单船公司作为买方于9月9日分别与南通中远川崎船舶工程有限公司签署了4艘19000TEU型造船协议,与大连中远川崎船舶工程有限公司签署了2艘19000TEU型造船协议,与中国船舶工业集团公司下属的中国船舶工业贸易有限公司及上海外高桥造船有限公司签署了3艘19000TEU型造船协议,与中国船舶重工集团公司下属的中国船舶重工国际贸易有限公司及大连船舶重工集团有限公司签署了2艘19000TEU型造船协议。该批11艘新造船协议船价共计15.093亿美元,交付日期均为2018年。
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.