摘要我国拥有九百六十万平方公里的陆地面积，以及两百七十万平方公里的海洋面积。 进入二十一世纪以来，随着我国海洋强国建设、海上丝绸之路等一些列战略的实施， 我国的海洋资源开发利用进入快速发展的轨道。未来对于海洋资源开发利用、海洋经 济转型升级、海洋生态环境保护、海洋防灾减灾和海洋权益维护等将成为重点发展的 领域。因而深入研究海洋，分析各种海洋现象产生的机理，寻求和把握其规律就有了 现实意义。79113

海洋运动中的内孤立波以能量巨大、持续时间长、对海洋构筑物危害大而闻名， 我国南海、台湾海峡等地区是内孤立波频发地区。对于内孤立波的研究既有典型意义， 也是现实需要。

本文系统总结回顾了国内外相关研究的现状，围绕内孤立波与水下潜体相互作用 问题展开了一下工作：

一、 根据三类内孤立波理论（ kdv、 ekdv 和 mkdv）， 流场控制方程采用 Navier—Stokes 方程，结合 VOF 法，基于 Fluent 的二次开发，采用设置造波边界方 法给定边界入口条件，并且利用数值耗散和开渠边界相结合的方法进行消波，建立的 二维和三维的内孤立波（ISW）数值水池，并将数值结果与理论解进行了对比，验证 了基于三类理论造波方法的可行性。

二、以三维内孤立波数值水槽为基础放入潜体，模拟了内孤立波与潜体的相互作 用。对内孤立波波幅不变时，潜体在不同深度时的水平力、垂向力以及转动力矩的变 化以及当潜深在同一位置时不同波幅对潜体外载荷的影响进行了分析和总结。研究结 果表明：潜体在穿过内孤立波波谷时所受的外载荷影响最为严重，同时，潜体的外载 荷随着内孤立波波幅的增大而增大。

以上结论可以看出，潜体设计应充分考虑内孤立波的影响，其结构应能抵御潜体 穿过内孤立波波谷、处于涉及地域统计内孤立波最大波幅时所需的强度并留有足够的 裕量。

毕业论文关键词:内孤立波;速度入口;潜体;数值水槽;两层流体

Abstract China has a land area of 9。6 million square kilometers, and 2。7 million square kilometers of ocean area。 Since the beginning of the 21st century, with the construction of China's maritime power, sea silk road series of strategic implementation, our country's marine resources development use into the track of rapid development。 Future for development and utilization of marine resources, marine economic transformation and upgrading, protection of the marine environment, marine disaster prevention  and mitigation and maritime rights and interests maintenance, etc。 will be the key development areas。 Therefore, further marine research, analysis various oceanographic phenomena, to seek and grasp the rules will have a practical significance。

Motion in the ocean in the isolated wave with great capacity, long duration, of marine construction hazards large and famous, in the South China Sea, the Taiwan Strait area is frequent occurrence of internal solitary waves 。 For internal solitary wave of research not only has the typical significance, but also a realistic need。

In this paper, a review of the status of related research at home and abroad, around the internal solitary waves and water submerged body interaction problem unfolded  as follows:

First, according to the three classes of internal solitary wave theories (KdV, ekdv and mKdV), flow control equations using Navier Stokes equation with VOF method, the two development based on Fluent, by setting the boundary wave method with given boundary conditions and using the method of entrance, numerical dissipation and canal boundary combination of the wave。 The establishment of two-dimensional and three-dimensional (ISW) internal solitary wave numerical pools, and the numerical results and theoretical solutions are compared to verify the feasibility of three kinds of wave theory based on the method。