自由站立式立管总体强度及敏感性参数分析

Global Strength and Sensitivity Parameters Analysis of Free Standing Hybrid Riser

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.

This paper analyzes the main factors affecting the global performance of FSHR and the effects of the uncertainty of variable design parameters on FSHR ＇s global strength and configuration based on the global strength analysis of FSHR through three-dimensional nonlinear time domain finite element program The results indicate that the case which occurs for 100 years is the most dangerous one. When flexible riser and FPSO is at the same plane, the direction the wave comes from rigid riser and goes to FPSO is the most dangerous one. FSHR system has a well decoupling function between floater motion and rigid riser. Only changing several parameters not a single can make FSHR global performance reach the best.