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基于三维非线性时域有限元程序对自由站立式立管(FSHR)进行了总体强度分析,并在此基础上对影响FSHR总体性能的主要参数进行敏感性分析,探讨设计变量的不确定性对FSHR总体性能和布局的影响.计算结果表明百年一遇海流载荷工况下为最危险工况,跳接软管和FPSO共面,波浪沿立管流向FPSO方向为最危险浪、流组合方向;FSHR系统对浮体运动和钢性主管之间具有良好的解耦作用;改变单一敏感性参数不能使得FSHR总体性能向好的趋势发展,需要同时调节几个参数才有可能使得FSHR总体性能达到最优.
Based on the three-dimensional nonlinear time-domain finite element program, the total strength of the free standing riser (FSHR) was analyzed. Based on the analysis, the sensitivity of the main parameters influencing the overall performance of the FSHR was analyzed and the uncertainty of the design variables FSHR overall performance and layout.The results show that under the condition of 100-year-old sea-flow load, it is the most dangerous condition, the hoses and FPSO are coplanar, and the wave is the most dangerous wave and flow direction in the direction of vertical pipe flow to FPSO. The FSHR system has a good decoupling effect between buoyancy and the steel director. Changing the single sensitivity parameter can not make the overall performance of the FSHR better. The need to adjust several parameters at the same time makes it possible to optimize the FSHR overall performance .