深水钻井隔水管疲劳损伤分析  

Fatigue damage analysis of deepwater drilling riser

作　　者：冯超 陈锟 付晨龙 李陈涛 张文婧 夏成宇[1] 钱利勤[1] FENG Chao;CHEN Kun;FU Chenlong;LI Chentao;ZHANG Wenjing;XIA Chengyu;QIAN Liqin(College of Mechanical Engineering,Yangtze University,Jingzhou Hubei 434023,China)

机构地区：[1]长江大学机械工程学院,湖北荆州434023

出　　处：《中国安全生产科学技术》2023年第8期52-58,共7页Journal of Safety Science and Technology

摘　　要：为研究涡激振动作用下隔水管的疲劳损伤规律,基于Euler-Bernoulli梁理论,建立隔水管动力响应控制方程,通过耦合尾流振子方程,对隔水管横流向涡激振动模型进行求解;利用雨流计数法和Miner准则,对涡激振动所导致的疲劳损伤进行分析;采用控制变量法研究不同因素下隔水管疲劳损伤情况及规律。研究结果表明:在涡激振动作用下,深水隔水管底部易发生疲劳破坏,可以通过增加隔水管壁厚度、顶张力或降低钻井液密度等方法改善;海流速度是影响涡激疲劳损伤的重要因素,随着海流速度增加,隔水管涡激疲劳损伤加快。研究结果可为防深水钻井隔水管疲劳损伤的优化设计以及保障深水钻井作业安全提供一定参考。In order to study the fatigue damage law of riser under the vortex-induced vibration,the dynamic response control equation of riser was established based on Euler-Bernoulli beam theory,and the transverse vortex-induced vibration model of riser was solved by coupling the wake oscillator equation.The fatigue damage caused by vortex-induced vibration was analyzed by the rain flow counting method and Miner criterion,and the fatigue damage of riser under different factors was studied by control variable method.The results show that the fatigue damage is most likely to occur at the bottom of deepwater riser under vortex-induced vibration,and it can be improved by using the methods such as increasing the riser wall thickness,top tension and reducing the drilling mud density.The ocean current speed is an important factor affecting the vortex-induced fatigue damage,and the increase of ocean current speed will accelerate the vortex-induced fatigue damage of riser.The research results can provide a theoretical reference for the optimization design of fatigue damage of deepwater drilling riser and ensuring the safety of deepwater drilling operation.

关 键 词：深水钻井 隔水管 涡激振动 疲劳破坏 

分 类 号：X937[环境科学与工程—安全科学]