【作者】 马强；

【导师】 胡铁牛；

【作者基本信息】 上海交通大学 ， 船舶与海洋结构物设计制造， 2008， 硕士

【摘要】 近20年来高新技术的崛起,为新型高性能船舶的发展提供了基础。世界经济全球化的发展,也必将带动水运的发展,从而对高性能船舶有了较高的社会需求,促使船舶向大型化、专用化、自动化、高速化、绿色化发展。本文介绍了近年来引起广泛关注的高性能船舶——多体船(三体船与五体船)的发展起源、设计思想和破舱稳性计算。多体船的设计概念是通过采用大长宽比的主船体来有效减小兴波阻力,而由此带来的稳性损失由侧体来弥补。因此,多体船的侧体在其破舱稳性中占有着举足轻重的作用。本文首先研究了侧体对多体船破舱稳性的影响,以探讨侧体的最佳空间位置。本文研究了多体船的破舱稳性计算原理:先计算多体船破舱后的浮态,而后计算各船体的力矩并进行线性叠加,然后计算多体船的破舱稳性。破舱稳性计算首先要计算船舶破舱后的浮态,浮态平衡方程矩阵解法中的雅可比矩阵前人没有对其进行收敛性判断。若船舶破损倾覆,则雅可比矩阵无解,本文在矩阵解法中加入了对浮态平衡矩阵收敛性判断的程序,进一步完善了浮态平衡方程的矩阵解法。然后本文以五体船和三体船的破舱实例计算来验证多体船侧体对其破舱稳性的影响。同时比较分析了五体船与三体船破舱稳性的不同。理论及试验结果都显示:对于多体船,侧体参数中对多体船破舱稳性起主要作用的是侧体的横距,侧体横距越大,多体船的破舱稳性就越好;纵距的绝对值越小,多体船的破舱稳性越好;五体船比三体船的破舱稳性好。本研究的意义是:进一步完善了船舶破舱稳性计算中浮态计算的矩阵解法。多体船侧体对其破舱稳性的影响研究对以后的多体船设计研究具有一定的参考意义。更多还原

【Abstract】 High-tech’s rise over the past 20 years provides the basis for the development of high-performance ships. The development of the world economic globalization will lead to the development of water transport, which will lead to high social demand of high-performance ships. And it will make ships go to the direction of large, dedicated, automated, high-speed, and green.This paper introduced the origin, design ideas and damaged stability of high-performance ships--multi-hulls (such as trimaran and pentamaran), which have attracted extensive attention in recent years. The slender multi-hulls offer the potentiality in reducing both the wave resistance and often the total resistance, but it is laterally unstable. So side hulls play an important role in the performance of damaged stability. This paper firstly studied the influence, which side hulls have on the damaged stability of multi-hulls, in order to explore the best spatial position of side hulls. And this paper studied the principal of damaged stability of multi-hulls: firstly calculate the floating state of damaged ship; then calculate the moment of each hull and have a linear superposition; finally calculate the damaged stability of multi-hulls. In the process of damaged stability calculation, the floating state has to be calculated firstly. Before matrix solutions are used to solute the equations of floating state, but the convergence of Jacobi matrix is not done, which appears in the matrix solutions. If the damaged ship capsized, the Jacobi matrix unresolves. So the judgement process of convergence of Jacobi matrix was added in the matrix solutions. And the calculations of damaged stability of catamaran and pentamaran were done to verify influence of side hulls on the damaged stability of multi-hulls. In the meantime, comparative analysises of the damaged stability between catamaran and pentamaran were done. The result shows that the transverse distance of side hulls and main hull plays the primary role in the damaged stability of multi-hulls; the larger the side hull transverse distance and the nearer longitudinal distance between the centre of side hull and the centre of main hull, the better its damaged stability and the damaged stability of pentamaran is better than that of trimaran.The significance of this study: it has improved the matrix solutions in the damaged stability; and this study on the influence which side hulls have on the damaged stability of multi-hulls has consultant significance in the design of multi-hulls.更多还原