简介:“21世纪海上丝绸之路”战略是新一届国家领导人在面临新的国内外经济、政治环境下做出的战略选择,为我国进一步的改革开放和深度参与世界经济的重大举措.新成立的中国(广东)自由贸易试验区广东自贸区的战略定位之一就是“21世纪海上丝绸之路”重要枢纽和桥头堡,这也是国家层面对自贸区进行扩容升级进程中的“广东特色”所在.“21世纪海上丝绸之路”对于广东自贸区的促进作用集中体现在对自贸区航运业的发展及粤港澳合作.
简介:Theextendingofacantileverandtransversemovingofadrillingfloorenablethejack-uptooperateinseveralwellpositionsaftertheJack-uphaspitched.Thecantileverallowableloadnephogramisthecriticalreferencewhichcanevaluatethejack-up’sdrillingability,designthecantileverstructureandinstructajack-upmanagertomaketheoperationssafe.Theintentofthispaperistoexploretheinterrelationshipsbetweenthecantileverposition,drillingfloorandtheloadsincludingwindforce,thestandset-backweightetc.,throughanalyzingthestructureandloadcharacteristicsofthex-typecantileverandthesimplifiedmechanicsmodelwiththerestrictionofthemaximummomentcapacityofthecantileversinglesidebeam.Referringtoseveraltypicalpositiondesignsloadvalues,thecantileverallowableloadnephogramisobtainedbyusingthesuitableinterpolationmethod.Thepapergivesamethodforcantileverallowableloaddesign,whichisprovedreliableandeffectivebythecalculationexample.