The main content of the paper is pided into five chapters: The first chapter is the introduction, which briefly introduces the research background, the purpose of  the research and the related research progress at home and abroad. In the second chapter, the related mathematical methods of numerical wave flume are introduced, including the governing  equations,  boundary  conditions,  fabrication  wave  theory,  meshing  and   the principle of mutual transformation between porous media model and netting. The third chapter firstly validates the numerical model of the single-layer submerged horizontal plate, and then simulates the wave field around the double-submerged horizontal plate by numerical model. Based on the single-layer submerged horizontal plate, the law of wave propagation in double-layer submerged horizontal plate is obtained.The fourth chapter studies the influence of the different number of the nets on the wave propagation and the improvement of the wave-absorption performance of the plate-net breakwater. In the fifth chapter, the influence of the height of the net on the wave propagation and the improvement of the wave-absorption performance of the plate-net breakwater are further studied according to the conclusions which have been drawn from the previous chapter.

Keywords: Numerical wave flume; Submerged horizontal plate; Porous media model; Two-point method; Plate - net structure

目 录

第一章 绪论 1

1.1研究的背景、目的和意义 1

1.2研究现状 1

1.2.1数值波浪水槽研究 1

1.2.2波浪与淹没式结构物研究 3

1.2.3网衣模型研究 4

1.2.4分离方法 5

1.3本文的主要工作 5

第二章 基本理论 7

2.1CFD流场数学模型 7

2.1.1控制方程 7

2.1.2初始边界条件 7

2.2数值波浪水槽 8

2.2.1造波理论 8

2.2.2消波理论 9

2.2.3网格划分及边界条件 9

2.3多孔介质模型 10

2.4分离方法—两点法 10

2.5小结 12

第三章 数值模型验证 13

3.1数值水槽造消波效果验证 13

3.2波浪与淹没式结构物模型验证 15

3.3网衣模型验证 18

3.4小结 22

第四章 波浪与双层板式防波堤的相互作用 23

4.1模型布置 23

4.2数值结果分析 25

4.2.1双板间距对双层板式防波堤消浪性能的影响 25

4.2.2入射波高对双层板式防波堤消浪性能的影响 30

4.2.3板长对双层板式防波堤消浪性能的影响 32