摘要文章研究了双浮箱浮式防波堤在线性化势流理论范围内，利用边界元法对波浪 作用下双浮箱浮式防波堤进行时域方程积分，根据二力平衡原理基于悬链线法建立 锚链力控制方程，采用迭代算法数值求解出锚链力，最后我们采用 Runge-Kutta 法来 求解采用牛顿第二定律构建的浮式防波堤时域运动方程。以此为基础，以南海海域 海况为研究背景，利用水动力软件 AQWA 分析双浮箱浮式防波堤水动力性能及其运 动响应。具体如下：79092

（1）频域范围内分析双浮箱浮防波堤的水动力参数

利用有限元软件 ANSYS 建立双浮箱浮防波堤模型，利用水动力软件 AQWA 得 到结构物的水动力模型，调用频域模块得到该防波堤在微幅波中的水动力参数。通 过分析比较，得到了水动力参数不同浪向角下随频率的变化规律。

（2）时域范围内分析双浮箱浮防波堤的运动响应及系泊缆张力 根据悬链线方程，对双浮箱浮防波堤应用悬链式系泊系统。运用 AQWA—NAUT

对于该防波堤及系泊系统进行了分析，得到了结构物在南海海域极端海况作用下的 运动响应以及系泊缆张力。

毕业论文关键词：双浮箱浮式防波堤；AQWA；运动响应；水动力特性

Abstract Applying the double pontoon floating breakwater in the linearized potential flow theo ry and using the boundary element method of wave under the action of double floating po ntoon type breakwater of integral equation in time domain, we get the load condition of fl oating body。Then according to the force balance principle based on the catenary method, we establish chain force control equation and get anchor chain force by using of numerical interative algorithm。 Finally, we apply the Runge Kutta method to solve the floating break water time-domain motion equations of Newton's second law construction。Taking this as t he foundation, and taking theSouth China Sea area as the research background, we use hyd rodynamic software AQWA to analyze double floating pontoon type breakwater hydrodyn amic performance and motion response 。 The details are as follows:

(1)Analysis of hydrodynamic parameters of double floating tank floating breakwater in frequency domain

Using finite element software ANSYS to establish the double pontoon floating breakwater model, hydrodynamic model of structure is got by using the hydrodynamic software AQWA, calling frequency domain module to get the breakwater in micro wave amplitude of hydrodynamic parameters。 Through analysis and comparison,rule of hydrodynamic parameters of different wave direction with the variation of the frequency can be shown。

（2）Time domain analysis of Twin-pontoon floating breakwater motion responses

and mooring line tension

According to the catenary equation , suspension chain mooring system is applyed to double pontoon floating breakwater。 The breakwater and mooring system is analyzed with the application of AQWA-NAUT, Inorder to get the action of motion response and mooring line tension of structures in the general sea state of the South China Sea。

Keywords: Twin-pontoon floating breakwater; AQWA; motion response; hydrodynamic characteristics

目 录

第一章 绪论 1

1。1  研究的背景 1

1。2  研究的目的与意义 1

1。3  浮式防波堤的类型 3

1。4  国内外有关浮式防波堤的研究概况