波流-碎冰耦合作用下平台动力定位辅助系泊模型试验研究

Model test of dynamic positioning assisted mooring of a platform under the coupling action of wave,current and managed ice

为评估某极区半潜平台的作业安全,开展波流-碎冰耦合作用下冰区半潜平台动力定位辅助系泊的模型试验,对比分析风浪流-碎冰载荷联合作用下平台动力定位系统在有、无加速度反馈工况下的运动及系泊响应,验证加速度反馈策略的有效性。提出切换定位点消冰策略消除半潜式平台立柱前浮冰积聚的现象,对比开启消除浮冰功能前,平台系泊系统张力大幅降低,进一步提高了平台的作业安全。

To evaluate the operational safety of a semi-submersible platform in a polar region,a model test of the dynamic positioning assisted mooring of the platform in the ice area under the coupling effect of wave,cur-rent and managed ice was carried out.The motion responses of the platform positioned by the dynamic posi-tioning system with and without acceleration feedback were analyzed,and the effectiveness of the accelera-tion feedback strategy was demonstrated.A switching positioning point strategy was proposed to eliminate the accumulation of ice floes in front of the column of the semi-submersible platform.The tension of the mooring system was greatly reduced by using the strategy,which further improved the operating safety of the platform.