摘要全球经济发展，能源需求不断增多，人类所使用的船舶由单独作业向多结构协同 作业发展。海洋平台大多不具有自航能力。因此需要运输船舶的协助。在输送货物或 者接收补给品时，运输船舶与海洋平台之间共同构成一个复杂的系统。如在货物运输 过程当中遇恶劣海况，则可能使两船之间的波浪扩大并与船体的运动产生共振，严重 破坏船舶结构，威胁船员的生命。现有研究中，各国学者在考虑液舱晃荡下运输船舶 的水动力问题，以及多浮体系统与系泊系统之间相互耦合运动等方面取得了相当大成 果，但是对于波浪中两自由浮式结构窄缝间的水动力的探索还处于开始阶段。82905

本文选用双驳船旁靠系统作为研究对象，采用 CFD 模拟的方法，对船舶的受力与 运动、窄缝间波面升高及窄缝内部流体运动情况进行了分析。本人在毕业设计期间主 要完成了以下几方面的工作：

（1）大量参考有关窄缝旁靠的文献，阅读有关旁靠流场，窄缝间流体运动及流 体与结构相互作用等相关课题文献，对之前有关并靠窄缝间流场的研究工作做了较为 全面的综述；

（2）基于流体力学和结构运动理论，建立数学模型，包括基本控制方程、湍流 模型、数值离散方法、自由液面捕捉法、边界条件及物体运动方程；

（3）借助 Fine/marine 软件，建立浮式结构和流场的几何模型及数值模型，包 括网格划分及计算参数设置，选定计算工况及监测点等；

（4）利用 Fine/marine 模拟两自由浮式结构物首浪情况下的运动，并分析窄缝 间流体的运动规律。

毕业论文关键词：窄缝间流场；浮式结构；数值模拟；旁靠；Fine/marine

Abstract With the development of global economy, energy demand has been increasing every day。 Ships people prefer are gradually changing their working patterns。 Instead of working alone, They come together and form a system, which makes the team more productive and efficient。 Most offshore platforms lack self-propulsion ability, as a result, they need the assistance of carrying vessel。 During the period of transportation, A rather complex system are formed by ship and platform。 If it unfortunately came across nasty sea condition at that time, ship structure would be destroyed because of the increasing wave resonance, which would put sailors’ lives in a dangerous place。 Among present researches, scholars around the world have accomplished quite a lot in hydrodynamic problems considering tank oscillation and coupled motions questions between multi-floating bodies and their mooring system。 But the research on hydrodynamic interactions in the narrow gap of two floating bodies in close proximity are barely started。

Side-by-side barges in close proximity was chosen as my subject in this study。 CFD simulation method was used to analyze ship motions, the forces on ship, wave elevation and fluid motions in the gap。 Following are work done by me during graduation project:

(1)Many articles on side-by-side constructions in close proximity, fluid motion in the gap and hydrodynamic interactions between ship and fluid have been read。 In the end, a summarization of the research done by people in the past and a comprehensive introduction on this topic are put forward。

(2))Based on the theory of fluid mechanics and structural motion, Mathematical model was built, which includes basic controlling formulation, turbulence model,  numerical discretization method, Free surface trapping method, boundary conditions and Equation of motion。

(3)With the aid of Fine/marine software, the geometry model and numerical model of floating structure and flow field are established, including the mesh pision, calculation parameter setting, selecting calculation conditions and picking monitoring points, etc。