摘要：在船舶、港口航道和海洋工程领域的中，作用于海上结构物的主要环境载荷是波浪力，因此建立数值波浪水槽模拟波浪的造波和消波以及对结构物的作用具有非常重要的科学价值和工程意义。建立高精度、高效的数值波浪水槽并应用于波浪和建筑物相互作用研究一直是近年来本学科的前沿课题。

本文通过GAMBIT软件建立了二维数值水槽网格，再在FLUENT中建立了二维数值水槽模型。在无旋条件下，以FLUENT软件为计算平台，采用分离式解法中的PISO算法对问题进行求解。非线性自由表面边界条件采用VOF方法。模型中采用推板式造波方式生成所需的的线性波浪以及非线性波浪（Stokes波），并且通过稀网格消波和添加动量源项方式消浪，消去在水槽末端壁面反射波的影响。造波和消波通过FLUEBT中的UDF实现。之后依据所建立的二维数值水槽分别的运动响应和波面时历曲线。

本文很好的完成了线性规则波和Stokes波的模拟，能够产生稳定的波场，模拟波浪与理论波浪基本吻合。采用的源项消波法也让消波区的波浪达到了消浪要求。模拟了固定式与浮式防波堤的消浪性能并对模拟结果进行了比较分析，与浮式防波堤相比固定式防波堤的消浪效果较好。

关键词：数值波浪水槽；造波和消波；规则波；非线性波

Abstract：In the field of ships, port waterways and ocean engineering, the main environmental loads acting on the sea structures are wave forces, so the establishment of numerical wave troughs is a very important scientific value in simulating the waves and waves of waves and the effects on structures And engineering significance. The establishment of high precision and efficient numerical wave sinks and applications in wave and building interaction research has been a frontier subject in recent years.

In this paper, two-dimensional numerical water tank is established by GAMBIT software, and a two-dimensional numerical water tank model is established in FLUENT. Under the condition of non - spin condition, FLUENT software is used as the calculation platform, and the problem is solved by PISO algorithm in the separation method. The nonlinear free surface boundary condition is VOF method. In the model, the required linear wave and nonlinear wave (Stokes wave) are generated by the push plate type wave method, and the influence of the reflected wave at the end wall of the sink is eliminated by the elimination of the dilute grid and the addition of the momentum source. Wave and wave propagation through UDUE in FLUEBT implementation. And then based  on the established two-dimensional numerical water tank, respectively, the motion response and wave surface time curve.

In this paper, we can complete the simulation of linear regular wave and Stokes wave, which can produce stable wave field. The simulation wave agrees well with the theoretical wave. The use of the source of the wave method to wave wave area to the wave requirements. The simulation results show that the ripple effect of the fixed breakwater is better than that of the floating breakwater.

Key words: numerical wave tank；wave making and wave elimination；regular wave； nonlinear wave

目 录

第一章 绪论 1

1.1研究背景 1

1.2国内外研究现状 1

1.3本文主要内容 3

第二章 理论背景 4

2.1软件介绍 4

2.1.1FLUENT软件介绍 4

2.1.2FLUENT组成结构及求解步驟