基于NSGA-Ⅱ算法的陡波型柔性立管优化设计方法  

Optimal Design Method of Steep Wave Flexible Riser Based on Algorithm NSGA-Ⅱ

作　　者：李英[1] 贾尚儒 LI Ying;JIA Shangru(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学水利仿真与安全国家重点实验室,天津300350

出　　处：《中国造船》2021年第4期207-218,共12页Shipbuilding of China

基　　金：工业和信息化部“深水半潜式生产储卸油平台工程开发项目”(MC-202030-H04)。

摘　　要：在柔性立管中部添加浮力块可使其形成陡波构型,合理的浮力块布置对陡波型柔性立管整体性能具有重要意义。论文以陡波型柔性立管悬挂点张力和锚固点张力为优化目标,以立管最大有效张力和最小弯曲半径为约束条件,构建了多目标优化模型。针对我国某海域应用于浮式生产储油装置的陡波型柔性立管系统,选取立管动态响应最大的4种典型工况开展动态时域模拟,研究了浮力块参数对立管悬挂点张力和锚固点张力的影响。综合考虑4种工况的极值结果,基于NSGA-Ⅱ算法开展了浮力块布置多目标优化设计,得到了关于悬挂点和锚固点最大张力的Pareto前沿。根据不同工程要求可在Pareto前沿中选择一个解作为最优解。By adding buoyancy modules in the middle of a flexible riser,a steep wave configuration can be formed.A reasonable arrangement of the buoyancy modules is of great significance to improve the motion performance of the riser system.A multi-objective optimization model was established with the suspension point tension and anchor point tension of the steep-wave flexible riser taken as the optimization objectives,and the maximum effective tension and the minimum bending radius of the riser as the constraints.For the steep wave flexible riser system applied to the FPSO in a certain area of the South China Sea,four typical operational scenarios with the largest dynamic response of the riser were selected to carry out dynamic simulation in the time domain,and influence of buoyancy modules parameters on the tension of the riser suspension point and anchor point tension was studied.Comprehensively considering the extreme values of the four operational scenarios,the multi-objective optimization design of the buoyancy modules layout was carried out based on the algorithm NSGA-Ⅱ,and the Pareto solution set of the maximum tension of the suspension point and the anchor point was obtained.For the specific engineering requirement,a suitable solution in the Pareto solution set can be selected as the optimal solution.

关 键 词：柔性立管 陡波构型 动态响应 多目标优化 NSGA-n算法 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]