摘要：During drilling operations, strong non-linear environmental loads are applied to the riser, which can generate powerful fatigue loads, resulting in safety hazards. This paper deals with the problem of the 330 m subsea wellhead connector in the Liu-hua 11鈥?1, which is subjected to long-term non-linear fatigue loading in drilling conditions. Examining the fatigue response law of the subsea wellhead connector ensures the safe operation of offshore oil and gas wells. First, fatigue tests were performed on key components to obtain the stress-fatigue life curve. The F22 strain fatigue life curve was constructed based on the Neuber stress-strain relationship theory and Manson-Coffin strain-life equation. Then, the overall drilling platform - riser - subsea wellhead - soil model was established, and the bending moment-stress data of the subsea wellhead connector was obtained via finite element analysis. Then, the fatigue load spectrum was determined via the MATLAB program using the rainflow counting theory. The response characteristics of the wellhead connector fatigue damage were also compared based on four fatigue damage accumulation theories. A set of fatigue calculation and analysis methods for subsea wellhead connectors was finally developed. This method can provide reference and guidance for subsequent studies. 漏 2024

ISSN号：0029-8018

卷、期、页：卷306

发表日期：2024-08-15

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：李中,姚旺

通讯作者：罗文涛,王名春,胡洋东

第一作者：王莹莹,李育房

论文类型：期刊论文

论文概要：李中,罗文涛,王莹莹,王名春,李育房,胡洋东,姚旺，A method for the fatigue-life assessment of subsea wellhead connectors considering riser wave-induced vibration，Ocean Engineering，2024，卷306

论文题目：A method for the fatigue-life assessment of subsea wellhead connectors considering riser wave-induced vibration