浮托安装可以在1～3天时间内完成组块的安装工作，且具有调试时间短、提前投产的特点。在海况恶劣海域，和组块吊装方案相比，该方法有助于抓住有限的时间窗口完成海上作业。目前，世界范围内仍有一些海域没有进行过浮托安装，在进行浮托安装之前，需要进行可行性论证。本文针对东海海域，对环境数据进行统计，采用3条浮托驳船，分别进行了浮托安装分析。从结构安全性及受作业环境条件影响角度考虑，重点针对进退船及对接工况进行分析。根据统一的浮托可行的标准，基于HYSY278/229/228的运动性能，东海环境条件，高位浮托及浮托作业可实施性，从低到高确定多组浮托环境条件，搜索得到对应的浮托环境条件，统计浮托作业概率，进行经济费用比较。分析结果表明，涌浪多的海域，波浪周期特别是横浪方向的周期显著增加，将大幅提高浮托对接时驳船的运动及对导管架的碰撞力，给浮托技术带来挑战。在这种海域中，动力定位船如278，比传统无动力的T型驳船，运动性能最优，可以抵御的浮托作业环境条件最大，作业窗口更多。如要在类似海域进行浮托安装，建议采用动力定位船舶，并采取相关降低涌浪影响的措施。
Floatover method can complete the topside installation in 1-3 days, and has the characteristics of short commissioning time and early production. Compared with the lifting method, floatover is able to grasp the limited time window to complete the operation at harsh sea.At present, there are still some sea areas around the world that have no floatover installation. Before carrying out the floatover installation, we need to carry out feasibility study in each new sea area. In this paper, feasibility study is conducted about East China Sea. The environmental data were analylized, and 3 floatover barges were used for floatover installation analysis. Considering the influence of structural safety, we focus on entry analysis and mating analysis. According to the unified floatover feasible standard, based on the performance of HYSY278/229/228, the environmental conditions of the East China Sea, and industry production ablility of LMUs and DSUs, we determined groups of floatover environment conditions from low to high and then find the maximum environment condition, get the corresponding floatover operational statistics. Installation costs are also compared with lifting method.The studies indicates that swell in East China Sea will inlarge the floatover barge motion and impact force to jacket, thus chanllege the floatover installation. In harsh area, dp tankers such as HYSY278, is better than T barge. It can operate in larger environment and have more operational windows. If floatover will be carried out in this sea area, measures should be taken to reduce the impact of swell too.
2019,41(6): 94-99 收稿日期：2018-05-07
DOI：10.3404/j.issn.1672-7649.2019.06.020
分类号：U664.1
作者简介：易丛(1982-),女,工程师,研究方向为浮托安装,以及FPSO、半潜平台等浮式结构的总体性能分析与设计
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