国外船舶破损稳性理论分析

船舶破损后的稳性问题是长期困扰造船界的难题,它涉及随机海况下破损船舶的摇摆、进水和倾覆等多方面的复杂技术问题。简要叙述了国外船舶破损进水后的稳性理论计算研究状况,介绍了国际上在破损船舶动力学模型、舱内进水与船体的相互作用、破损口处的进流与出流模拟等3方面的研究进展。研究表明,三自由度耦合的数学模型在处理舷侧破损问题方面很有效,而六自由度非线性数学模型是未来船舶破损稳性计算的发展趋势,而且必须将船体与进水当作相互高度耦合的动力系统,采用水动力学进水模型进行处理。今后,还需采用模型试验深入观测波浪中船舶破损后的物理现象,以了解破损稳性机理。

Overseas Research Progress in Theoretical Analysis for Ship Damage Stability

Ship damage stability is a long-lasting puzzle in shipbuilding field,which involves many complex technical issues as rolling,flooding and capsizing of damaged ship in random waves.A review of overseas research progress in ship damage stability assessment was presented in the paper.The investigations of mathematical model,inflow/hull interaction and water ingress/egress simulation in broken opening were introduced and analyzed.It shows that the mathematical model of three-degree-of-freedom is effective for broadside breakage problem,and the nonlinear model of six-degree-of-freedom is a good research direction in ship damage stability calculation in the future.The inflow and hull should be regarded as strong coupled system and be treated with hydraulic inflow model.The phenomena of damaged ship in waves should be observed in details by model experiments to find out the mechanism of damage stability.