深水供应船耐波性及减摇效果研究

Study on the Deepwater Supply Vessel Seakeeping and Anti-rolling Effect

采用基于三维频域势流理论的数值计算方法,对某深水供应船运动性能进行了计算,并结合深水供应船的特点,选取相关安全作业和安全航行的耐波性运动衡准,分析了深水供应船的耐波性能。计算结果表明,该船能满足7级风对应海况下的安全作业以及12级风对应海况下的安全航行要求。根据实际情况,采用势流和黏性相结合的时域数值计算方法,对该船所配备的平面被动式减摇水舱的减摇效果进行了计算和评估,减摇水舱装载率为60%舱高,在不规则波中进行计算,结果显示该船在？7级风对应海况作业时,有望获得25%~44%的不规则波减摇率,艏斜浪下的减摇率较横浪大,并且随着波高的增加减摇率下降。该研究可为了解此类船舶的耐波性及减摇性提供参考。

Using the 3D frequency domain potential theory based numerical computation method, this paper calculates the motion performance of a deepwater platform supply vessel（PSV）. On the basis of the ship＇s characteristics, the safe operation and safe navigation seakeeping standards are selected in order to analyze the seakeeping performance of the deepwater supply vessel. The result shows that the vessel can meet the safe operation requirements under sea conditions of wind scale 7, and can meet the safe navigation requirements under sea conditions of wind scale 12. According to the actual situation, a combined potential and viscous flow time domain numerical calculation method is adopted, the anti-rolling effect of the planar passive type anti-rolling tank onboard this ship is calculated and evaluated. With the loading factor of 60% tank height, the calculation result in irregular waves shows that when the ship operates in sea states corresponding to ？7 wind scale, the rolling-damper efficiency in irregular waves can be as high as 25%~44%. The rolling-damper efficiency is found larger in bow sea than in beam sea and it decreases with the increase of wave height. This study can provide some reference for understanding the seakeeping and anti-rolling performance of such ship type.