摘要：The double wellhead system equipped with a suction anchor is subject to alternating loads, such as shear forces and bending moments, which can lead to fatigue failure. Considering the impact of the suction anchor on the subsea wellhead, an equivalent theory has been derived, and a refined equivalent model established to determine the fatigue hot spot moment-stress transfer function. To address the challenges of high computational complexity and convergence difficulties in the dynamic analysis of the refined equivalent model, a simplified theory of global coupling analysis has been derived, and a corresponding simplified subsea wellhead model established. Utilizing the environmental conditions of X gas field in China south sea, the fatigue life of the double wellhead system with suction anchor is evaluated. The results were compared with those of a conventional subsea wellhead, demonstrating that the double wellhead system with suction anchor can significantly improve fatigue life of the subsea wellhead. The fatigue life of high and low pressure welds in conventional subsea wellheads under drilling conditions has been extended from 17.77 years to 1.20 years鈥?186.16 years and 25.62 years, respectively. 漏 2024 Elsevier Ltd

ISSN号：0029-8018

卷、期、页：卷311子辑1

发表日期：2024-11-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国外T1）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Ocean Engineering

参与作者：李健昌

通讯作者：孔伟,孙海波,李兴业,韦琦

第一作者：王莹莹

论文类型：期刊论文

论文概要：王莹莹,孔伟,李健昌,孙海波,李兴业,韦琦，A decoupling model for fatigue life assessment of double wellhead system with subsea suction anchor，Ocean Engineering，2024，卷311子辑1

论文题目：A decoupling model for fatigue life assessment of double wellhead system with subsea suction anchor