针对大型浮式生产储卸油装置(Floating Production and Storage Offloading,FPSO)因船体尺度与干重过大导致干拖方案受限的问题,以上海中远海运重工有限公司某大型FPSO从船厂码头至绿华山锚地的湿拖作业为研究对象,通过理论计算与工程...针对大型浮式生产储卸油装置(Floating Production and Storage Offloading,FPSO)因船体尺度与干重过大导致干拖方案受限的问题,以上海中远海运重工有限公司某大型FPSO从船厂码头至绿华山锚地的湿拖作业为研究对象,通过理论计算与工程实践相结合的方法,分析拖航阻力、最小系柱拖力、拖航稳性和拖航总纵强度等关键参数,并基于环境载荷动态评估制定拖航方案,研究短距离湿拖路线规划、多拖轮协同牵引策略设计和风浪流联合作用下的拖航阻力计算、拖轮系柱拖力与拖带设备强度校核,以及拖带装置配置、航速控制、应急避碰等技术要求。结果表明,通过精细化阻力计算与环境适配,短距离湿拖方案可有效克服大型无动力FPSO运输的技术瓶颈,研究形成的技术要求与操作指南可为大型海工装置湿拖作业的安全实施提供理论支撑与实践范式。展开更多
Structural properties of the ship container logistics network of China(SCLNC)are studied in the light of recent investigations of complex networks.SCLNC is composed of a set of routes and ports located along the sea o...Structural properties of the ship container logistics network of China(SCLNC)are studied in the light of recent investigations of complex networks.SCLNC is composed of a set of routes and ports located along the sea or river.Network properties including the degree distribution,degree correlations,clustering,shortest path length,centrality and betweenness are studied in different definition of network topology.It is found that geographical constraint plays an important role in the network topology of SCLNC.We also study the traffic flow of SCLNC based on the weighted network representation,and demonstrate the weight distribution can be described by power law or exponential function depending on the assumed definition of network topology.Other features related to SCLNC are also investigated.展开更多
文摘针对大型浮式生产储卸油装置(Floating Production and Storage Offloading,FPSO)因船体尺度与干重过大导致干拖方案受限的问题,以上海中远海运重工有限公司某大型FPSO从船厂码头至绿华山锚地的湿拖作业为研究对象,通过理论计算与工程实践相结合的方法,分析拖航阻力、最小系柱拖力、拖航稳性和拖航总纵强度等关键参数,并基于环境载荷动态评估制定拖航方案,研究短距离湿拖路线规划、多拖轮协同牵引策略设计和风浪流联合作用下的拖航阻力计算、拖轮系柱拖力与拖带设备强度校核,以及拖带装置配置、航速控制、应急避碰等技术要求。结果表明,通过精细化阻力计算与环境适配,短距离湿拖方案可有效克服大型无动力FPSO运输的技术瓶颈,研究形成的技术要求与操作指南可为大型海工装置湿拖作业的安全实施提供理论支撑与实践范式。
基金supported by Youth Foundation for Research of the Waterborne Transportation Institute.
文摘Structural properties of the ship container logistics network of China(SCLNC)are studied in the light of recent investigations of complex networks.SCLNC is composed of a set of routes and ports located along the sea or river.Network properties including the degree distribution,degree correlations,clustering,shortest path length,centrality and betweenness are studied in different definition of network topology.It is found that geographical constraint plays an important role in the network topology of SCLNC.We also study the traffic flow of SCLNC based on the weighted network representation,and demonstrate the weight distribution can be described by power law or exponential function depending on the assumed definition of network topology.Other features related to SCLNC are also investigated.
