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超深水钻井船波浪载荷分析及总体强度评估
Wave load analysis and overall strength assessment of ultra-deepwater drilling ship
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- DOI:
- 作者:
- 王宏伟，杨浩杰，段晶辉，徐辉，梁园华
- 作者单位:
- 1.中国船级社，北京 100007 2.中国船级社海洋工程技术中心，天津 300457
- 关键词:
- 超深水钻井船；波浪载荷；有限元分析；总体强度
ultra-deepwater drilling ship; wave load; finite element analysis; overall strength
- 摘要:
- 超深水钻井船作为深海油气资源开发的核心装备，长期承受风、浪、流等环境载荷与货物作业载荷的
联合作用。该类船型因月池区域存在大开口及钻台等特殊结构布置，受力状态复杂，其总体结构强度的安全性
对平台可靠运行至关重要。针对含月池大开口的超深水钻井船在复杂海洋环境下的结构受力问题，以某型超深
水钻井船为研究对象，分别构建水动力分析模型和全船有限元精细模型。基于三维势流理论，计算该船在作业
海况与生存海况下的波浪荷载并揭示其载荷特性，进而依据规范对不同装载工况下的全船总体强度进行校核分
析。结果表明，所研究钻井船各工况总体强度均满足规范限值要求，结构高应力区及薄弱区域主要集中于船中
月池大开口部位。研究成果可为同类超深水钻井船的载荷分析与结构优化设计工作提供参考。
As the core equipment for deep-sea oil and gas resource development, ultra-deepwater drilling ships are subjected to the combined effects of environmental loads such as wind, waves, and currents, as well as cargo operation loads for a long time. Due to the special structural layout such as large openings in the moonpool area and the drill floor, this type of ship has a complex stress state, and the safety of its overall structural strength is crucial to the reliable operation of the platform. In view of the structural stress problem of ultra-deepwater drilling ships with large moonpool openings in complex marine environments, a certain type of ultra-deepwater drilling ship was taken as the research object, and a hydrodynamic analysis model and a refined global finite element model were established. Based on the three-dimensional potential flow theory, the wave loads of the ship under operating and survival sea conditions were calculated and their load characteristics were revealed. Furthermore, the overall strength of the entire ship under different loading conditions was checked and analyzed in accordance with specifications. The results show that the overall strength of the studied drilling ship under all working conditions meets the specification limits, and the high-stress and weak areas of the structure are mainly concentrated at the large moonpool opening in the midship. The research results can provide a reference for the load analysis and structural optimization design of similar ultra-deepwater drilling ships.