中文摘要：

流体在月池内发生共振时,有可能给船舶带来多种危险。建立基于N-S方程和VOF法的三维数值波浪水池,通过实现船体与波浪的耦合运动,对月池内流体发生活塞运动共振情况下的船体运动做出了数值预报,研究了船体运动和月池内流体运动的相互影响。通过与无月池结构船体运动对比,得到了共振情况下月池内流体活塞运动会增大船体垂荡运动的结论;通过与船体静止情况下月池内流体运动的对比,得到了船体运动会增大月池内流体活塞运动的结论。另外还研究了月池内的流场变化,以研究月池振荡的机理。

英文摘要：

A vessel may suffer a variety of risks in the resonance condition of water oscillation in moonpool.In this paper,a three-dimensional numerical wave basin based on NS equations and VOF method is established.Numerical prediction of vessel motions in the resonance condition is given by realizing coupled motions of vessel in waves.And the interaction of vessel motions and water motions in the moonpool is studied.By comparing with the motions of vessel without moonpool,it is concluded that in the resonance condition,the heave motion of vessel can be increased by the piston effects of water in moonpool;and by comparing with the water behaviors in moonpool when the vessel is kept fixed,it is concluded that the water motion in moonpool can be increased by the motion of vessel.Besides,the characteristics of the flow field in the moonpool are also investigated to explore the mechanism of moonpool oscillation.