简介:加快建设智慧港口不仅是当前及今后一个时期推进四个交通建设的重要内容,更是今后港口物流发展的潮流和行业转型升级的重要手段。1月22日,交通运输部印发《推进智慧交通发展行动计划(2017—2020年)》,智能化港口建设成为水运智慧发展的重点。随后,交通运输部进一步印发《关于开展智慧港口示范工程的通知》,提出选取一批港口开展智慧港口示范工程建设,全面带动我国港口信息化、智能化水平的提升。这已是今年交通运输部第二次为港口智能发展“定调”。在此背景下,如何对港口管理运作做出智慧响应,拥抱智慧港口的信息化、智能化、最优化等巨大优势成为值得思考的问题。
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:Tosolvethedimensionallimitationsofphysicalmodelsintests,anequivalentwaterdepthtruncateddesignforaclassicalSPARworkingin913mwaterwasinvestigated.Thewaterdepthwasreducedto736mandthento552m.Asthiswasdone,themooringlinelengths,EAvalue,andmasspermeterwereadjusted.Truncationrulesandformulasforparametersandtruncationfactorswereproposed.SPARstaticcharacteristicsweremadetobeconsistentwiththoseatfullwaterdepth.Thenfurthertime-domaincoupledanalysiswascarriedoutfortheSPARwhenthemooringsystemexperiencedwaves.Themooringlinesweresimulatedbyquasi-staticmethod.Globalresponsesandmooringlineforceswerefoundtoagreewellwithtestresultsforaprototypeatthatwaterdepth.Thetruncationmethodprovedtoberobustandreliable.