西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (3): 102-108.DOI: 10.11885/j.issn.1674-5086.2022.06.20.01

• 石油与天然气工程 • 上一篇    下一篇

浅海高压立管涡激振动及疲劳特性分析工艺

姜玉峰1, 徐万海2   

  1. 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
  • 收稿日期:2022-06-20 发布日期:2024-06-26
  • 通讯作者: 徐万海,E-mail:xuwanhai@tju.edu.cn
  • 作者简介:姜玉峰,1987年生,男,汉族,山东寿光人,高级工程师,主要从事海洋油气钻完井、增产及水下技术方面的研究工作。E-mail:jiangyf3@cnooc.com.cn;徐万海,1981年生,男,汉族,黑龙江齐齐哈尔人,教授,主要从事海洋管道安全防控研究。E-mail:xuwanhai@tju.edu.cn

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

JIANG Yufeng1, XU Wanhai2   

  1. 1. CNOOC EnerTech-Shanghai Drilling & Producing Branch, Changning, Shanghai 200335, China;
    2. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Nankai, Tianjin 300072, China
  • Received:2022-06-20 Published:2024-06-26

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。

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

Abstract: 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.

Key words: jack-up platform, high pressure riser, vortex-induced vibration, fatigue damage, wake oscillator model, finite difference

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