为研究自升式风电平台绕桩吊载荷与环境载荷在不同方向组合工况，对桩腿受力特性的影响，采用简化理论分析方法，对桩腿支反力、弦杆载荷等进行分析，并采用有限元方法对分析结果进行对比验证。通过对比分析发现，当绕桩吊载荷与环境载荷在桩腿底部引起的垂直反力同向叠加时，桩腿底部的水平反力为反向抵消效果；而上述桩腿载荷在各弦杆间的分配则主要由桩腿刚度和抬升系统刚度所影响。通过实船数据模拟分析，发现桩腿垂直反力，水平反力与强度利用因子以及齿轮载荷的最危险状态不在同一组合工况中出现，即绕桩吊载荷和环境载荷方向相同的组合工况无法覆盖最危险工况，因此需要对绕桩吊载荷方向与环境载荷方向进行更为详尽的组合分析，进而保证平台结构的安全性。
The leg mechanic characteristics of self-elevating platform under the superposition effects of encircling crane and environmental loads were studied in combination of load directions. The analysis of the reactions and chord loads was performed by a simplified theoretical analysis method. Meanwhile, a finite element method was employed to verify the simplified analysis results. It was found that the reactions caused by encircling crane and environmental loads respectively were suppressed mutually in horizontal direction at the combination of enhancing in vertical direction, vice versa. And the load distribution among chord members was mainly influenced by the stiffness of the legs and the lifting system. Then a real ship simulation was analyzed, it was found that the most critical state of leg vertical reaction, horizontal reaction, strength utilization factor and gear loads do not occur simultaneously, which means, the combination of same direction of encircling crane and environmental loads cannot cover all the most critical condition. Therefore, a more detailed combination analysis of encircling crane and environmental loads is necessary to ensure the safety of the platform structure.
2025,47(2): 167-172 收稿日期：2024-3-21
DOI：10.3404/j.issn.1672-7649.2025.02.027
分类号：U674.38
基金项目：上海市科委2021年启明星资助项目（21QB1405900）；中交集团2022年重大科研课题（2022-ZJKJ-06）
作者简介：金晶（1987 – ），男，硕士，高级工程师，研究方向为船舶与海洋工程
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