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以中国南海荔湾深水气田开发项目为依托,以具备动力定位的HYSY201作为铺管船,开展深水海底管道S型起始铺设过程中海管的结构完整性评估。采用海管、铺管船、起始缆、起始端PLET和辅助浮筒系统耦合动态分析方法,通过合理设计托管架半径、海管离去角、海管铺设张力以及作业气候窗,使得在整个起始铺设和正常铺设过程中,海管的Von Mises应力、结构应变以及局部屈曲均满足设计及规范要求。
Based on the Liwan Deepwater Gas Field Development Project in the South China Sea, HYSY201 with dynamic positioning is used as a pipelaying vessel to evaluate the structural integrity of the pipe during the S-type initial laying of deepwater submarine pipelines. The coupled dynamic analysis method of sea-pipe, pipe-laying ship, starting cable, initial PLET and auxiliary buoy system is adopted. By reasonably designing the radius of the stinger, the departure angle of the sea-going pipe, the tensile force of the sea pipe and the climate window, During initial laying and normal laying, the Von Mises stress, structural strain and local buckling of the pipe meet the design and specification requirements.