“世越号”提升阶段双抬浮驳船系泊动力的计算  

Dynamic mooring force calculation of twin barges during ‘Sewol' lifted above seabed

作　　者：姚宗 王伟平[1] 蒋岩[1] 陈世海[1] 

机构地区：[1]交通运输部上海打捞局,上海200090

出　　处：《水动力学研究与进展（A辑）》2018年第1期17-27,共11页Chinese Journal of Hydrodynamics

摘　　要："世越号"是利用水面双驳船作为基础用安装在驳船上的液压提升系统打捞出水的沉船。在"世越号"被提升离开海底后,三条船的环境载荷都由两条驳船的系泊系统承担。两条驳船平行布置在"世越号"两侧,距离较近,有较强的多体水动力耦合效应。计算三条船的总环境载荷并不是单条驳船环境载荷的简单叠加。在"世越号"打捞工程设计阶段,进行了大量水池模型试验。应用试验结果,建立了含有矫正系数的多体耦合运动计算模型。用矫正的多体耦合运动计算模型算出的船舶运动与水池模型试验结果吻合度很高。应用矫正的多体耦合运动计算模型以及准静态系泊系统计算模型对整个"世越号"打捞系统进行时域计算,得到的系泊缆动态拉力与模型试验结果和现场实测值吻合得比较好,稍有保守。这套系泊力计算方法对于设计出的系泊系统是偏保守的,在设计阶段是比较合理的。‘Sewol＇ is salvaged out of water by hydraulic lifting systems, which are installed on decks of twin barges. After ‘Sewol＇ is lifted above seabed, environmental loads of the three vessels are withstood by mooring system of the twin barges. Strong hydrodynamic coupled effects occur for the three vessels as the twin barges stay at two sides of ‘Sewol＇ closely. Total environmental loads of the three vessels are not simply sum of each vessel. Many cases of model testing are conducted for ‘Sewol＇ lifting system during salvage plan design stage. Based on model testing results, multi-body coupled motion analysis model with calibration parameters is established. Vessel motion results calculated from calibrated multi-body coupled motion analysis model are very close to model testing results. Time domain analysis of the whole ‘Sewol＇ salvage system is completed with the calibrated multi-body coupled motion analysis model and quasi-static mooring system model. Dynamic mooring forces calculated in this way are aligned well with the model testing results and full scale measurement at site. The calculated dynamic mooring forces are slightly conservative, which is suitable for a conservative mooring system design.

关 键 词：“世越号” 耦合运动 系泊 模型试验 现场实测 

分 类 号：TV148[水利工程—水力学及河流动力学]