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Second, in the establishment of a viable wave in three-dimensional numerical flume isolated  on  the  basis  in  the  submerged  body  in  the  sink,  simulated  successfully   the

interaction between internal solitary wave and a submerged body, analysis of the internal

II

solitary wave amplitude constant, horizontal force of the underwater body in different depth, vertical force and torque change as well as the depth in the same  position at different load。The results of the study show that, submerged body in through the trough of internal solitary waves caused by the external load effect is  most  serious,  at the same time, the external load of a submerged body with isolated wave amplitude increases and increases。 Therefore, in practical engineering, solitary wave will be on a submerged body security poses a great threat, in the design and application of submerged body must consider internal solitary waves。

Above conclusions can be seen, the submerged body design should fully consider the internal solitary wave effect, its structure should be can resist the submerged body through trough of internal solitary waves, is involved in regional statistical internal solitary waves the maximum amplitude of the required strength and leave enough margin。

Key words:internal solitary wave;velocity inlet ;submerged body ;numerical tank;two-layerfluid

目 录

第一章 绪论 1

1。1 研究目的和意义 1

1。2  国内外研究现状 2

1。2。1 内孤立波的实验研究 2

1。2。2 内孤立波的数值模拟研究 2

1。3 需深入开展研究的问题 5

1。4 本文研究内容 5

第二章 内孤立波造波理论 6

2。1 内孤立波理论 7

2。2 内孤立波 Kdv 理论 7

2。3 内孤立波 eKdv 理论 8

2。4 内孤立波 mKdv 理论 9

2。5 内孤立波数值水槽 10

第三章 内孤立波与数值水槽 11

3。1 数值模型 11

3。2 二维内孤立波数值模拟 11

3。3  三维内孤立波与数值水槽 13

3。3。1  数值模型及边界条件 13

3。3。2  数值模拟结果显示 14

第四章 三维内孤立波与潜器的相互作用 16

4。1 引言 16

4。2  计算模型 16

4。3  数学模型—网格划分 17

4。4 数值结果与分析 18

4。5  孤立波的力对潜体的作用 24

4。5。1  孤立波在不同潜深对潜体力的作用 24

4。5。2  对于不同波幅下内孤立波的波浪力 25

结 语 27

致 谢 28

参考文献 29

第一章 绪论