Harbor Oscillations Induced by Nonlinear Transient Waves

本文提出了一种计算非线性瞬态波浪引起的港口振荡的有限元模型。 垂直积分的二维连续性和动量方程，描述完全非线性和弱色散波，是数值模型的基础。 由于入射波被允许是具有宽范围的频率分量的不规则波，该模型具有检查入射波的长波分量的激励和共振的能力，以及通过非线性在港内产生的自由和束缚亚重力波。 在数值模型的开发过程中，将研究频域和时域方法。 最终的数值模型还将包括以下实用组件：底部摩擦、耗散（吸收）边界和港口入口损失。 将特别注意近海区域开边界条件的处理。 将开发前置和后置处理器，以便用户能够方便地修改输入数据，包括测深数据、港口几何形状和入射波情况。 输入信息和数值解的图形显示也将包括在后处理器中。 整个软件包旨在成为港口工程师和规划师的有用和实用的设计工具。 ***

9714182 Liu It is proposed to develop a finite element model for computing harbor oscillations induced by nonlinear transient waves. Vertically integrated two-dimensional continuity and momentum equations, describing fully nonlinear and weakly dispersive waves, are the basis of the numerical model. Since the incident waves are allowed to be irregular waves with a wide range of frequency components, the model has the capability of examining the excitation and resonance of the long wave components of the incident waves as well as the free and bound infragravity waves generated inside the harbor through nonlinearity. During the development of the numerical model both the frequency domain and the time domain approaches will be investigated. The final numerical model will also include the following practical components: bottom friction, dissipative (absorbing) boundaries, and harbor entrance loss. Special attention will be paid to the treatment of the open boundary condition in the offshore region. Pre- and post-processors will be developed so that users can easily modify the input data including the bathymetry data, harbor geometry and the incident wave conditions. Graphic displays of input information and numerical solutions will also be included in the post- processors. The entire software package is aimed to be a useful and practical design tool for harbor engineers and planners. ***