有限水深中破损船舶的运动与波浪载荷研究

由于有限水深中船舶搁浅和触礁等严重破损事故频发,为了减少事故的发生,对有限水深中船舶破损后的运动及波浪载荷的研究显得十分必要。文章基于三维势流理论,引入有限水深自由面Green函数,在频域内使用奇点分布法对一艘首部破损进水的散货船在有限水深中的运动与波浪载荷展开了计算,并根据劳氏船级社规范做了短期预报。短期预报结果表明,该散货船破损进水后,船体所受垂向和水平波浪弯矩均比破损前有明显增加,且在较浅水深中变化更为显著。

Research on damaged ship motion and wave load in finite water

For serious damaging accidents of ships, such as stranding, usually happen in shallow sea, it is very essential to carry out some researches on damaged ships’ motion and wave load in finite water aiming at reducing accidents. In this paper, by using the free-surface Green function for finite water depth and 3D source distribution method, the motions and wave loads of a bulk carrier damaged in finite depths and flooded in bow are studied in frequency domain. And short-term predictions of wave loads are made accord-ing to rules of Lloyd Register. Numerical result shows that the damaged ship’s vertical and horizontal wave loads increase obviously, and the damage’s influence is more significant in shallow water.