考虑间隙水体阻尼修正的过驳双船系统动力响应研究

Motion response of ship-to-ship system considering fluid damping correction

利用阻尼修正的势流理论对过驳双船系统进行研究。建立了过驳双船系统CFD数值计算模型,通过在双船间隙自由水面施加粘性阻尼盖的方法对势流理论进行修正。对双船过驳系统在考虑与不考虑修正两种情况下的时域结果进行对比分析,结果表明:双船各自由度的运动响应以及各系缆护舷的受力,在不计及粘性修正时的计算结果皆高于修正后的结果,因而考虑流体粘性的修正是非常必要的。

The damping-corrected potential flow theory was used to study the ship-to-ship transfer system.The CFD numerical model of ship-to-ship transfer system was established and the theory of potential flow was modified by applying viscous damping lid on the free water surface between two ships.The time domain results of ship-to-ship transfer system with and without correction were compared and analyzed.The results show that the calculation results of the motion response of each degree of freedom of the two ships and the force of each mooring or fender without viscosity correction are higher than the corrected results,and that it is very necessary to consider the correction of fluid viscosity.