Novel safety evaluation technique for ships in offshore anchorage under rough seas conditions for optimal ship routing
Novel safety evaluation technique for ships in offshore anchorage under rough seas conditions for optimal ship routing
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DOI：
10.1016/j.oceaneng.2022.111323
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发表时间：
2022-06
影响因子：
5
通讯作者：
Sang-Won Lee;K. Sasa;Chen Chen-Chen;K. T. Waskito;Ik-Soon Cho
中科院分区：
文献类型：
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作者：
Sang-Won Lee;K. Sasa;Chen Chen-Chen;K. T. Waskito;Ik-Soon Cho
近年来，由于港口封锁和海上运输货物量增加等原因，在近海锚地等待的船舶数量有所增加。此外，港口码头已下令船舶留在港口外，以防止停泊事故时，预测大浪。抛锚的船只，特别是那些面对公海的船只，由于在恶劣的海况下拖锚而面临危险。在本研究中，我们进行了数值模拟锚泊船舶运动再现拖曳锚。此外，我们进一步评估了锚泊船舶运动的基础上低估的波浪条件。最后，我们建立了一个新的风险评估技术，锚定船舶搁浅风险，海洋结构物的损坏，碰撞风险评估。基于垂直位移与龙骨下间隙（UKC）之间的关系，对搁浅风险进行了评估。根据港口海图信息可以识别船舶的破损风险。在此基础上，综合考虑最近接近点（CPA）、船舶区域重叠指数（SDOI）等主要影响因素，对船舶碰撞风险进行了定量评估。结果表明，所提出的方法可以有助于港口安全和船舶运营方面的最佳船舶路由。
In recent years, the number of waiting ships in offshore anchorage has increased owing to several reasons, such as the port lockdown and increased cargo volumes in maritime transportations. Moreover, port terminals have ordered ships to stay outside the harbor to prevent mooring accidents when rough waves are forecasted. Anchored ships have been exposed to dangers owing to dragging anchors under rough sea conditions, especially those facing the open seas. In this study, we perform a numerical simulation of anchored ship motions to reproduce the dragging anchor. Additionally, we further evaluated the anchored ship motions based on underestimated wave conditions. Lastly, we constructed a novel risk assessment technique for anchored ships to assess the stranding risk, damage to marine structures, and risk of collision. The stranding risk was evaluated based on the relationship between the vertical displacement and Under Keel Clearance (UKC). Damaging risk can be identified from the information of harbor charts. The risk of collision was quantitatively assessed considering the main influential factors such as Closest Point of Approach (CPA), and the Ship Domain Overlapping Index (SDOI). Results showed that the proposed methodology can contribute to port safety and ship operation in terms of optimal ship routing.