垂直导桩和固定方箱防波堤透射系数研究

Transmission Coefficient Study of Vertical Pile-restrained Breakwater and Fixed Pontoon Breakwater

本文采用势流理论作为程序设计基础,其中规则波对浮防波堤时域内的作用力,用其时域内积分方程计算,采用边界元作为程序设计方法,浮防波堤三个方向运动的运动方程以四阶Runge-Kutta法编程计算。将锚链锚泊单浮筒浮防波堤水动力特性的计算结果与实验室所做物理模型实验结果差别很小。然后运用该模型计算了不同结构形式以及不同吃水的垂直导桩防波堤和固定方箱透空式防波堤的消浪性能。

As the design basis, potential flow theory is used to calculate the effect of regular wave on pontoon-type breakwater within time domain by using the integral equation within time domain. Boundary element is adopted to calculate the equations for the motion of pontoon-type breakwater in three directions by using the fourth order Runger-Kutta method. First of all, the hydrodynamic characteristics of single pontoon breakwater with anchor chain are calculated, which is close to the value of physical model test result. Afterwards, the above mathematic model is used to calculate the wave-damping performance of vertical pile-restrained breakwater and fixed pontoon breakwater under the condition of different drafts.