半潜式平台系泊断裂瞬态漂移过程的稳性分析与探讨

A Stability Analysis of Floating Platform of the Transient Drift Process during the Mooring Line Break in Extreme Sea Condition

针对近几年灾害环境下发生的多座半潜式平台系泊断裂漂移的事故,提出了一种研究这种特殊过程平台稳性的分析方法,将系泊断裂过程的时域耦合运动分析融入到该过程稳性分析中,并对某一现实中的半潜式钻井平台,完成了系泊断裂后平台漂移过程的稳性分析。分析结果表明,该平台系泊断裂后平台漂移过程的稳性可能会不满足要求,有发生进水倾覆的危险,该过程的稳性问题需要被关注,但该过程的稳性可以通过限制进水点位置或临时水密处理进水点进行有效预防。

Floating platforms are one of the main facilities for oil and gas exploration and production. It is important to ensure the platforms are safe. The time domain coupled simulation of the movement of the semi submersible of the transient drift process during the mooring line break is provided and the stability analysis of this process is presented. The results indicate that the semi would fast drift and would have a serious tilt when the mooring line breaks and this increases overturning moments and may result in the semi not meeting the stability requirements during this process. The research shows that it is necessary to pay attention to the stability problem of the transient drift process during the breaking of the mooring line. The stability problem can be avoided by properly locating of down-flooding points.