The topside floatover installation is always a great challenge and is sensitive to environmental conditions.In this study,experimental analysis on the mating operation of the floatover installation in different wave h...The topside floatover installation is always a great challenge and is sensitive to environmental conditions.In this study,experimental analysis on the mating operation of the floatover installation in different wave headings is presented.The continuous mating operation using the rapid transfer technique was experimentally simulated with the assistance of the jacking system and the ballast system.In the continuous transfer modeling,the topsides loads were transferred onto the jacket by several consecutive steps,including the first rapid jack-down for the 30%loads,continuous 30%−70%load transfer and the second repaid jack-down for the remaining 30%loads.Motions of the barge and the topsides as well as loads on the Deck Support Unite(DSU)and the Leg Mating Unite(LMU)in different wave headings were measured.Experimental results illustrated the complex motion behavior and load characteristics of the continuous transfer operation.Results indicate that the rapid jack-down operations will lead to impact loads and larger lateral DSU loads.The bow quartering seas are much more dangerous as it gives rise to the larger motions and loads.Comparisons with the traditional steady-state modeling indicate that the continuous transfer modeling has greater advantages over the steady-state modeling on predicting the loads.展开更多
海洋平台的安装分析是平台结构设计的重点,特别是当平台结构形式特殊时,安装工况可能是结构设计的控制性工况。本文中组块加DSF(Deck Support Frame)模块,总共3.2万t,平台尺度和重量都超出常规平台的规模。新的安装模式和分析方法对设...海洋平台的安装分析是平台结构设计的重点,特别是当平台结构形式特殊时,安装工况可能是结构设计的控制性工况。本文中组块加DSF(Deck Support Frame)模块,总共3.2万t,平台尺度和重量都超出常规平台的规模。新的安装模式和分析方法对设计者提出了较高的要求,如何准确模拟组块实际承受的荷载和边界条件是结构分析的关键。已完成的安装设计工作为今后的类似项目设计提供了宝贵经验。展开更多
文摘The topside floatover installation is always a great challenge and is sensitive to environmental conditions.In this study,experimental analysis on the mating operation of the floatover installation in different wave headings is presented.The continuous mating operation using the rapid transfer technique was experimentally simulated with the assistance of the jacking system and the ballast system.In the continuous transfer modeling,the topsides loads were transferred onto the jacket by several consecutive steps,including the first rapid jack-down for the 30%loads,continuous 30%−70%load transfer and the second repaid jack-down for the remaining 30%loads.Motions of the barge and the topsides as well as loads on the Deck Support Unite(DSU)and the Leg Mating Unite(LMU)in different wave headings were measured.Experimental results illustrated the complex motion behavior and load characteristics of the continuous transfer operation.Results indicate that the rapid jack-down operations will lead to impact loads and larger lateral DSU loads.The bow quartering seas are much more dangerous as it gives rise to the larger motions and loads.Comparisons with the traditional steady-state modeling indicate that the continuous transfer modeling has greater advantages over the steady-state modeling on predicting the loads.
文摘海洋平台的安装分析是平台结构设计的重点,特别是当平台结构形式特殊时,安装工况可能是结构设计的控制性工况。本文中组块加DSF(Deck Support Frame)模块,总共3.2万t,平台尺度和重量都超出常规平台的规模。新的安装模式和分析方法对设计者提出了较高的要求,如何准确模拟组块实际承受的荷载和边界条件是结构分析的关键。已完成的安装设计工作为今后的类似项目设计提供了宝贵经验。
