在深海油气资源开采与装备开发中，随着水深增加，静水压溃失稳成为结构最主要的失效模式。以南海奋进号FPSO内转塔单点锥形浮筒在深水回接钢缆作业为例，研究了锥形壳式结构受压极限承载力。系统地总结了结构屈曲失稳理论和方法，对锥形壳式结构振型、特征值屈曲以及是否考虑初始几何缺陷敏感性的非线性屈曲等进行了深入分析。结果表明，锥形壳式结构屈曲失稳与最大变形无相关性，考虑初始几何缺陷的非线性屈曲方法可以较准确地评估结构的极限承载力，为中国南海深水油气和装备开发中壳式锥形结构设计提供有益的参考与借鉴。
In the exploitation of deep-sea oil and gas resources and equipment development, the hydrostatic pressure collapse and instability of structures become the main failure mode as the water depth increases. Taking the internal turret of NHFJ FPSO as an example for deep water reconnection of steel wire, the ultimate compressive bearing capacity of a conical shell structure was studied. It system summarizes the theory and methods of structural buckling instability, and conducts in-depth research on the vibration mode, eigenvalue buckling, and nonlinear buckling of conical shell structures with or without considering the sensitivity of initial geometric defects. The results show that structural buckling instability is not correlated with maximum structural deformation. The nonlinear buckling method considering initial geometric defects can accurately evaluate the ultimate bearing capacity of conical shell structures, providing useful reference and inspiration for the design of conical shell structures in oil and gas and equipment development in the South China Sea.
2025,47(8): 133-138 收稿日期：2024-7-5
DOI：10.3404/j.issn.1672-7649.2025.08.022
分类号：TE95
基金项目：中国海洋石油集团级重点攻关课题（KJGJ-2023-0001）
作者简介：黄曙光(1977-),男,硕士,高级工程师,研究方向为海洋工程浮式结构物
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