半潜式平台稳性研究

海洋资源勘探不断向深海发展,适合深海作业的半潜式平台成为研究热点,而稳性校核多是针对自升式平台,少有对半潜式平台的稳性研究。考虑到柱稳式平台与自升式平台稳性恒准的差异,本文针对半潜式平台,用Moses软件计算半潜式平台稳性,具体做法为对某一半潜式平台进行数字化建模,之后通过改变横摇角得到平台的风倾力矩和复原力矩曲线,从而对平台的完整稳性、碰撞破损稳性以及单舱进水剩余稳性进行分析校核。得出结论如下：1）该平台在油田拖航下最危险的情况为艏摇角60°时,在其它工况下最危险的情况为艏摇角30°时;2）半潜式平台吃水的增大不利于平台的完整稳性;3）在油田拖航工况下,舱室的组合碰撞破损对平台稳性影响最小;4）对于碰撞破损稳性来说,半潜式平台的稳性程度不一定随着吃水增加而降低,具体情况要根据在不同吃水下不同的舱室组合来判断;5）平台在作业工况、远洋拖航工况和油田拖航工况下最危险的进水舱室分别为WB01P、FWD4P和AFT3P;6）平台的吃水增加不利于平台单舱进水后的剩余稳性。希望本文提出的方法可为其他半潜式平台的稳性分析提供参考。

Study on Stability Analysis of Semi-submersible Platform

Marine resource exploration continues to develop towards the deep ocean. Semi-submersible platforms suitable for deep-sea operations have become hot research topics, while stability checks are mostly for jack-up platforms, and few studies have been conducted on the stability of semi-submersible platforms. Considering the difference between the stability stability of the column-stabilized platform and the jack-up platform, this article uses Moses software to calculate the stability of the semi-submersible platform for the semi-submersible platform. The specific method is to digitally model a certain semi-submersible platform. Later, the platform"s wind tilt moment and recovery moment curve were obtained by changing the roll angle, so as to analyze and verify the platform"s complete stability, collision damage stability, and single-chamber influx remaining stability. The conclusions are as follows: 1) The most dangerous situation of the platform under towing in the oil field is when the roll angle is 60 °, and the most dangerous situation under other conditions is when the roll angle is 30 °; 2) The draught of the semi-submersible platform The increase of the value is not conducive to the complete stability of the platform; 3) the combined collision damage of the cabin has the smallest impact on the stability of the platform under the towing condition of the oilfield; 4) the stability of the semi-submersible platform for the stability of the collision damage The degree does not necessarily decrease with the increase of draught. The specific situation should be judged according to the combination of different cabins under different draughts. 5) The most dangerous flooding of the platform under operating conditions, ocean towing conditions and oil field towing conditions. The cabins are respectively WB01P, FWD4P and AFT3P; 6) The increase of the draft of the platform is not conducive to the remaining stability of the platform"s single cabin after flooding. It is hoped that the method proposed in this paper can provide a reference for the stability analysis of other semi-submersible platforms.