浅海高压立管涡激振动及疲劳特性分析工艺  

Analysis of Vortex-induced Vibration and Fatigue Characteristics of High-pressure Riser in Shallow Sea

作　　者：姜玉峰 徐万海[2] JIANG Yufeng;XU Wanhai(CNOOC EnerTech-Shanghai Drilling&Producing Branch,Changning,Shanghai 200335,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Nankai,Tianjin 300072,China)

机构地区：[1]中海油能源发展股份有限公司上海工程技术分公司,上海长宁200335 [2]天津大学水利工程仿真与安全国家重点实验室,天津南开300072

出　　处：《西南石油大学学报（自然科学版）》2024年第3期102-108,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：随着东海油气资源的不断开发,开发成本较低的自升式平台将得到广泛应用。立管所在海洋环境复杂多变,其结构长度与直径比值较大,在海流作用下会发生涡激振动。采用尾流振子模型对高压立管涡激振动响应进行预报,并基于DNV规范,根据S-N曲线法对结构疲劳进行计算。模型通过有限差分法进行离散求解。研究重点关注顶张力对立管的涡激振动及疲劳特性影响。结果表明,顶张力会影响立管的涡激振动响应,并进一步改变结构的疲劳寿命,影响结构安全性。With the continuous development of oil and gas resources in the East China Sea,jack-up platforms with lower development costs will be widely used.The marine environment where the riser is located is complex and changeable.Due to the large ratio of structural length to diameter,vortex-induced vibrations will occur under the action of ocean currents.In this paper,the wake oscillator model is used to predict the vortex-induced vibration of the high-pressure riser.Based on the content of the DNV specification,the S–N curve method is used to calculate the structural fatigue.The model is discretely solved by the finite difference method.The research focuses on the influence of the top tension with the vortex-induced vibration and fatigue characteristics of the riser.It is found that the top tension will affect the vortex-induced vibration response of the riser,and further change the fatigue life of the structure,and head affect the safety of the structure.

关 键 词：自升式平台 高压立管 涡激振动 疲劳损伤 尾流振子 有限差分法 

分 类 号：TE832[石油与天然气工程—油气储运工程] TV312[水利工程—水工结构工程]