横流向涡激-参激耦合振动下深水钻井隔水管疲劳损伤预测  

Fatigue damage prediction of deepwater drilling riser under cross-flow vortex-parametric-coupled vibration

作　　者：王宴滨 高德利[1] 王金铎 赵宏川 WANG Yanbin;GAO Deli;WANG Jinduo;ZHAO Hongchuan(MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《中国石油大学学报（自然科学版）》2022年第6期119-126,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金面上项目(52074310);国家自然科学基金创新研究群体项目(51821092);中央高校基本科研业务费专项(2462021QNXZ006)。

摘　　要：考虑深水钻井过程中浮式平台的升沉运动,基于Vander Pol尾流振子模型,建立深水钻井隔水管横流向涡激-参激耦合振动力学分析模型和控制方程,采用Galerkin法和Newmark-β方法对控制方程进行求解,获得涡激-参激耦合振动下深水钻井隔水管的应力时程曲线;采用雨流计数法和Palmgren-Miner线性累积损伤准则,获得深水钻井隔水管的疲劳损伤热点,在此基础上讨论波高、波浪周期、海面海流流速、顶张力对隔水管疲劳热点处疲劳损伤的影响。结果表明:隔水管横流向涡激-参激耦合振动疲劳损热点位于隔水管底部;波高主要通过影响隔水管参激振动特性影响隔水管的疲劳损伤,波高越大,疲劳损伤越大;波浪周期主要通过改变参激振动中隔水管的轴向力影响其疲劳损伤,波浪周期越小,疲劳损伤越大;海面海流流速主要通过改变隔水管横流向的涡激振动特性影响其疲劳损伤,海面海流流速越大,疲劳损伤越大;顶张力主要通过改变隔水管的轴向力分布影响隔水管的横流向涡激振动,进而对其疲劳损伤产生影响,顶张力系数越小,疲劳损伤越大。In this study,considering the heave motion of a floating platform during deepwater drilling,a mechanical analysis model and governing equations of cross-flow vortex-parametric-coupled vibration were established based on the Vander Polwake oscillator model.The Galerkin method and Newmark-βmethod were used to solve the governing equations,and the stress time history curves of deepwater drilling riser were obtained.The hotspots of fatigue damage on the drilling riser were figured out based on the rain flow counting method and the Palmgren-Miner linear principle.The effects of wave height,wave period,sea current velocity and top tension on the fatigue damage were investigated.The results show that the hotspot of fatigue damage is located at the bottom of the riser under vortex-parametric-coupled vibrations.The wave height can greatly affect the vibration-induced vibration characteristics,and the larger the wave height,the greater the fatigue damage.The wave period mainly affects the fatigue damage by changing the axial force of the riser in parametric vibrations,and the smaller the wave period,the greater the fatigue damage.The fatigue damage of the riser can be affected by the sea surface current velocity mainly through the cross-flow vortex-induced vibration characteristics,and the fatigue damage increases with the flow velocity.The top tension mainly affects the cross-flow vortex-induced vibration by changing the axial force distribution,and the smaller the top tension coefficient,the greater the fatigue damage.

关 键 词：深水钻井隔水管 涡激-参激耦合振动 GALERKIN法 NEWMARK-Β法 疲劳损伤 

分 类 号：TE21[石油与天然气工程—油气井工程]