自升式平台通过桩靴插入海床站立作业，桩靴与海床土壤发生相互作用进而对桩腿的转动产生约束。本计算分析基于规范及理论公式，分析桩土作用转动刚度对于桩腿强度的主要影响因素，以某圆柱腿自升式平台为例，利用有限元软件，对不同桩土转动刚度及波浪周期作用下的自升式平台载荷及桩腿强度进行计算分析，得到了圆柱桩腿在桩土转动刚度作用下的受力特点及屈曲强度变化规律，为后续自升式平台的研发提供参考。
Self-elevated platforms jack up by means of spudcans penetrating into seabed and spudcans interact with the soil of the seabed, which creates the rotational stiffness for legs. Based on the rules, regulations and theoretical equations, this study analyzes the influence of rotational stiffness upon legs. Taking a self-elevated platform with cylindrical legs for example, this study uses FEA software to analyze the platform loads and leg strength under the influence of different rotational stiffness and wave period. The loads feature and leg buckling strength change pattern of cylindrical legs with rotational stiffness of spudcan-soil interaction was gained. Suggestion was proposed to provide reference for the research and innovation of subsequent self-elevated platform.
2025,47(17): 177-182 收稿日期：2025-1-7
DOI：10.3404/j.issn.1672-7649.2025.17.028
分类号：U674.35
作者简介：钱笠君(1987-),男,硕士,高级工程师,研究方向为船舶结构设计
参考文献：
[1] 中国船级社, 海上移动平台入级规范[S]. 北京: 人民交通出版社, 2023.
[2] 姜琳. 桩-土相互作用的海洋平台动力响应研究[D]. 大连: 大连理工大学, 2005.
[3] 李虎, 吴卫国, 甘进. 考虑结构桩土相互作用自升式工作平台研究[J]. 华中科技大学学报(城市科学版), 2010, 27(3): 86-90.
LI H, WU W G, GAN J. Research on multi-purpose offshore jack-up platform based on ANASYS[J]. Journal of HUST(Urban Science Edition), 2010, 27(3): 86-90.
[4] 孙雪荣, 闻静. 自升式平台的桩基刚度对自由振动影响的研究[J]. 船舶, 2013, 24(5): 36-38.
SUN X R, WEN J. Research on free vibration influence of pile foundation stiffness for self-elevating drilling units[J]. Ship & Boat, 2013, 24(5): 36-38.
[5] 王建华. 考虑桩土非线性作用的自升式平台结构强度评估[D] . 大庆: 东北石油大学, 2019.
[6] SNAME. Guidelines for site specific assessment of mobile jack-up units[S]. Technical & Research Bulletin 5-5A, 2002.
[7] 龚闽, 谭家华. Liftboat fixity with the interaction between the soil foundation and the structure[J]. China Ocean Engineering, 2005, 19(3): 421-432.
[8] API. Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms-Working Stress Design[S]. 2005
[9] 中国船级社, 海洋工程结构物屈曲强度评估指南[S]. 北京: 人民交通出版社, 2022.
[10] 刘圆, 周其新, 李晔. 自升式平台桩腿有效长度系数计算方法研究[C]//中国航海科技优秀论文集, 2013.
[11] 钱笠君, 赵夕滨. 绕桩吊式风电安装平台桩腿总强度设计[J]. 船舶, 2017, 177(2): 50-53.
QIAN L J, ZHAO X B. Global strength design of pile legs for wind turbine installation platform equipped with leg encircling crane[J]. Ship & Boat, 2017, 177(2): 50-53.
[12] ABS. Rules for Building and Classing Mobile Offshore Units [S]. 2024.
[13] ISO 19905-1. Site-specific assessment of mobile offshore units[S]. 2016.
