破损进出水对船舶参数横摇的影响（英文）

Effects of Inflow and Outflow of Floodwater on the Parametric Roll of a Damaged Ship

船舶破损进水不一定会导致船舶倾覆,在破损流动过程以及破损流动达到稳定之后,破损船舶的运动特性非常值得研究。文章主要基于CFD方法和势流方法研究了破损进水对船舶参数横摇的影响。首先基于非定常RANS方程结合VOF方法,研究了破损舱室的破损流动过程,并且通过已有的模型试验,验证了计算方法的可靠性;然后,基于三维时域混合源法,考虑破损进出/水引起的额外载荷,研究了破损流动对破损船舶参数横摇运动的影响。研究表明,破损流动对横摇幅值的影响类似于被动减摇水舱,并且影响力度与破损舱室所在的纵向位置有关。

A damaged ship flooded with water does not necessarily end up with capsizing.Motions of a damaged ship during and after flooding are also worth studying.This work studied the effects of floodwater on the parametric roll of a damaged ship using a combined CFD and potential theory method.Water flooding process of a damaged compartment was simulated by the unsteady RANS equations combined with the VOF method.The accuracy of the method was verified by one available model test on flooding process.The parametric roll of the damaged ship was calculated based on the three dimensional time domain potential theory.Influence of flooding water was studied by coupling the forces obtained from flooding process simulation as external loads.The results show that the effects of floodwater on parametric roll are similar to passive anti-roll tank and are dependent on the position of damaged compartment.