The safety of offshore pipeline has drawn a great deal of attention during deepwater installation due to the combined actions of high external pressure, axial tension, and bending moment. Meanwhile, the pipeline confi...The safety of offshore pipeline has drawn a great deal of attention during deepwater installation due to the combined actions of high external pressure, axial tension, and bending moment. Meanwhile, the pipeline configuration has a remarkable effect on the structural behaviour of the tube. The special studies focus on the deepwater S-lay technique in the present paper. The stiffened catenary theory is applied to establish the static equilibrium governing differential equation of a pipe element, and the solution equations of the total pipeline configuration from a lay-barge over a stinger to the seabed are derived, The numerical iteration method for solving pipeline configuration is described in detail, and the corresponding program is developed to conduct the analysis of effects of various parameters such as laying water depth, pipe diameter, thickness of concrete weighted coating layer, stinger length, control strain, and axial tension on pipeline configuration. The results show that the laying water depth, the submerged weight of the pipe, and the axial tension are the critical factors influencing pipeline configuration. In addition, geometrical parameters of the stinger such as length, radius, and shape have an important effect on the pipe-laying capacity of the vessel. The validity of the program is further verified by means of a comparison with results obtained from the commercial finite element software OFFPIPE.展开更多
在海底管道铺设项目中,需要S-lay型铺管系统和J-lay型铺管系统完成铺管任务。分别对两个系统进行合理的空间布置设计,将其集成于同一艘深水起重铺管船。对双铺管系统协同作业进行设计,使两个系统共享管段预制线、共享弃置与回收(Abandon...在海底管道铺设项目中,需要S-lay型铺管系统和J-lay型铺管系统完成铺管任务。分别对两个系统进行合理的空间布置设计,将其集成于同一艘深水起重铺管船。对双铺管系统协同作业进行设计,使两个系统共享管段预制线、共享弃置与回收(Abandonment and Recovery,A&R)绞车系统,实现优势互补、提高铺管作业效率。展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 51009122)the Fundamental Research Funds for the Central Universities (Grant No. 2010QNA4030)the National High Technology Research and Development Program of China (863 Program, Grant No. 2006AA09A105)
文摘The safety of offshore pipeline has drawn a great deal of attention during deepwater installation due to the combined actions of high external pressure, axial tension, and bending moment. Meanwhile, the pipeline configuration has a remarkable effect on the structural behaviour of the tube. The special studies focus on the deepwater S-lay technique in the present paper. The stiffened catenary theory is applied to establish the static equilibrium governing differential equation of a pipe element, and the solution equations of the total pipeline configuration from a lay-barge over a stinger to the seabed are derived, The numerical iteration method for solving pipeline configuration is described in detail, and the corresponding program is developed to conduct the analysis of effects of various parameters such as laying water depth, pipe diameter, thickness of concrete weighted coating layer, stinger length, control strain, and axial tension on pipeline configuration. The results show that the laying water depth, the submerged weight of the pipe, and the axial tension are the critical factors influencing pipeline configuration. In addition, geometrical parameters of the stinger such as length, radius, and shape have an important effect on the pipe-laying capacity of the vessel. The validity of the program is further verified by means of a comparison with results obtained from the commercial finite element software OFFPIPE.
文摘在海底管道铺设项目中,需要S-lay型铺管系统和J-lay型铺管系统完成铺管任务。分别对两个系统进行合理的空间布置设计,将其集成于同一艘深水起重铺管船。对双铺管系统协同作业进行设计,使两个系统共享管段预制线、共享弃置与回收(Abandonment and Recovery,A&R)绞车系统,实现优势互补、提高铺管作业效率。
