船艙浸水過程水動力分析

Hydrodynamic Analysis of Cabin Flooding Process

安全是船舶在海上航行最重要的，船舶安全性問題持續被研究，像是逃生及船舶破損等，而船體破損時的浸水一直是重點探討問題，主要原因為受損船舶是否適合繼續航行取決於船體破損的嚴重程度。如果能清楚了解船舶浸水時的動態行為，則可以預測船舶狀態與浸水的關聯，能即時給予船員最適合的救援方式，因此模擬狀況發生時的情況是必要的。本研究透過計算流體力學方法，使用Ansys Fluent軟體模擬靜水狀態下箱型船體在船側破損時的浸水過程。先進行破損船體在固定不動時的浸水模擬，接著再使用動態網格及6DOF技術達成破損船體在浸水過程中運動的模擬。本研究成功捕捉到破損船體內部的流場現象和運動歷程，像是流速、流量、壓力、速度向量、艙壁受力、船體位移和船體轉動運動。本研究結果可作為未來探討更複雜船舶破損浸水問題的參考依據。

Safety is the most important thing for ships sailing at sea. The safety of ships has been continuously researched, such as escape and ship damage, and the water flooding when the ship is damaged has always been a key issue. The main reason is that whether the damaged ship is suitable for continuing to sail depending on the severity of the damage to the ship. If the dynamic behavior of the ship when it is flooded can be clearly understood, the relation-ship between the state of the ship and the flooding can be predicted, and the most suitable rescue method can be given to the crew in real time. Therefore, it is necessary to simulate the situation when the situation occurs. In this research, through the method of computational fluid dynamics, Ansys Fluent software is used to simulate the flooding process of the box-shaped ship when the side of the ship is damaged in the still water state. First carry out the flooding simulation of the damaged ship when it is fixed, and then use the dynamic grid and 6DOF technology to simulate the movement of the damaged ship during the flooding process. This research successfully captured the flow field phenomena and motion history inside the damaged ship, such as velocity, flow, pressure, velocity vector, bulkhead force, ship displacement, and ship rotational motion. The results of this research can be used as a reference for future discussions on more complex ship damage and flooding problems.