| 考虑涡激运动下海洋柔性立管的疲劳损伤分析 |
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| 引用本文： | 张火明,陈国庆,陆萍蓝,余润梁,管卫兵.考虑涡激运动下海洋柔性立管的疲劳损伤分析[J].海洋工程,2022,40(1):29-38,159. |
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| 作者姓名： | 张火明 陈国庆 陆萍蓝 余润梁 管卫兵 |
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| 作者单位： | 中国计量大学 浙江省流量计量技术重点实验室,浙江 杭州 310018;中国计量大学 工程训练中心,浙江 杭州 310018;自然资源部第二海洋研究所,浙江 杭州 310012 |
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| 基金项目： | 浙江省自然科学基金项目(LY19E090004)；卫星海洋环境动力学国家重点实验室开放基金资助项目(SOED1706)；浙江省教育厅科研项目(Y201738206) |
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| 摘 要： | 基于ABAQUS/AQUA模块,当Spar平台发生涡激运动时,对与平台相连接的柔性立管进行时域动态响应分析,得到了不同折合速度下柔性立管的应力响应曲线.对立管触地区域和悬垂段进行了细化的分析,并利用S-N曲线和Miner线性累积损伤理论对平台涡激运动引起的柔性立管疲劳损伤进行了计算.研究结果表明:平台涡激运动对立管触地区域和悬垂段的影响较大,这两部分最容易在长时间的工作中产生疲劳损伤.特别是平台运动到近点时,立管触地区域受到的应力急剧增加,这个区域是立管工作的危险区域,应该特别注意.该研究结论可以作为立管结构设计和海底铺设时的参考,通过增加立管触地区域的结构强度和优化铺设方式,从而来提高立管的疲劳寿命和系统的安全性.
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| 关 键 词： | Spar平台 涡激运动 柔性立管 折合速度 触地区 疲劳损伤分析 |
| 收稿时间： | 2021/1/29 0:00:00 |
Fatigue damage analysis of flexible riser under vortex-induced motion |
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| ZHANG Huoming,CHEN Guoqing,LU Pinglan,YU Runliang,GUAN Weibing.Fatigue damage analysis of flexible riser under vortex-induced motion[J].Ocean Engineering,2022,40(1):29-38,159. |
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| Authors: | ZHANG Huoming CHEN Guoqing LU Pinglan YU Runliang GUAN Weibing |
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| Institution: | Zhejiang Provincial Key Laboratory of Flow Measurement Technology, China Jiliang University, Hangzhou 310018, China;Engineering Training Center, China Jiliang University, Hangzhou 310018, China; Second Institute of Oceanography, MNR, Hangzhou 310012, China |
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| Abstract: | Based on ABAQUS/AQUA module, when vortex-induced motion occurs on Spar platform, the time-domain dynamic response analysis of flexible risers connected to the platform is carried out, and the stress response curves of flexible risers at different reduced speeds are obtained. The touchdown area and suspension section of riser are analyzed in detail, and the fatigue damage of flexible riser caused by vortex-induced motion of platform is calculated by S-N curve and Miner linear cumulative damage theory. The results show that: the vortex-induced motion of the platform has a great influence on the touchdown area and the overhang section of the riser, which are prone to fatigue damage during long-term operation. Especially when the platform moves to the near point, the stress on the touchdown area of the riser increases sharply. This area is a dangerous area for riser work and should be paid special attention to. The research conclusion can be used as a reference for riser structure design and submarine laying. The fatigue life of riser and system safety can be improved by increasing the structural strength of riser touchdown area and optimizing the laying method. |
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| Keywords: | Spar platform vortex-induced motion(VIM) flexible riser reduction speed touch area fatigue damage analysis |
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