限制水域船体下蹲预报(英文)

Prediction of Ship Squat in Restricted Waters

船体下蹲对船舶的水动力性能有着重要的影响,尤其是在限制水域,下蹲现象通常非常明显,精确地预报下蹲对正确评估船舶水动力性能和保证船舶在限制水域的航行安全有着重要的意义。文章介绍了各种预报船体下蹲的方法,并以KCS船型为例,采用一种一阶Rankine源面元法对限制水域航行船舶的下蹲进行预报,分别计算了浅水和浅窄航道中的船体下蹲,得到了船速、水深和船-岸距离对船体下蹲的影响,研究结果表明,船速、水深对船体下蹲有显著影响。

The ship squat has important influences on ship hydrodynamic performance. Accurate pre- diction of the squat is of great significance to correctly evaluate ship hydrodynamic performance and to ensure navigation safety in restricted waters. In this paper, various methods for predicting ship squat are summarized and introduced. A first-order Rankine source panel method is applied to pre- dict the squat of a ship sailing in restricted waters. Numerical results are obtained for container ship KCS in shallow water and shallow channel. The influences of ship speed, water depth and ship-bank distance on the squat are analyzed. The results show that squat is notably affected by ship speed and water depth.