摘要：During installation, catenary risers exhibit low tension in the touchdown zone (TDZ) of the seabed. Manufacturing deviations in the riser and the yaw rotation of the installation vessel may induce the unbalanced distribution of torsion. Combined with tension, loop formation may occur and lead to extreme damage. This study established a finite element model (FEM) for a steel catenary riser (SCR) using OrcaFlex software to analyze the effect of a nonlinear uneven seabed on loop formation. Four typical uneven seabed profiles, including a trench, an upheaval, a depression, and a slope, were constructed, while five key nonlinear seabed soil parameters, including mudline shear strength (Sum), shear strength gradient (ρ), suction ratio (fsuc), suction decay parameter (λsuc), and normalized maximum stiffness (Kmax) were proposed for parametric analysis to summarize the response rules of maximum tension, maximum compression and maximum bending moment of the riser loop. A specific sea area was selected for the case study to verify the applicability of the response rules. The case study also confirmed that the uneven seabed profile and nonlinear seabed soil properties had a combined effect on the riser loop, further preventing loop formation and reducing subsequent damage. ? 2022 Elsevier Ltd

ISSN号：0029-8018

卷、期、页：卷269

发表日期：2023-02-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：EI（工程索引）,地学领域高质量科技期刊分级目录（国外T1）

发表期刊名称：Ocean Engineering

参与作者：黄俊

通讯作者：贾纪川,高磊,陈磊磊,王树江

第一作者：顾继俊

论文类型：期刊论文

论文概要：贾纪川,顾继俊,黄俊,高磊,陈磊磊,王树江，Numerical simulation of loop formation in catenary risers on nonlinear uneven seabed，Ocean Engineering，2023，卷269

论文题目：Numerical simulation of loop formation in catenary risers on nonlinear uneven seabed