圆弧型浮式防波堤防浪效果的解析研究

给出了圆弧型浮式防波堤防浪效果计算的解析方法.假定防波堤刚性垂直薄壁、空间固定和水深恒定.假想存在一个圆柱面,把流场划分为内外区域,在每个区域上将速度势用特征函数展开,然后在它们的公共边界上进行衔接.衔接的原则是公共边界上速度连续、压力连续,从而可得到关于未知系数的一组线性代数方程组,解出未知系数,即可求得流域中任意一点的速度势和波高.数值结果给出了不同入射波波长及防波堤不同垂向沉深时防波堤周围波幅的等高线图.结果表明,圆弧型浮式防波堤的防浪效果与入射波波长和防波堤的垂向沉深密切相关.

Analytical Research on the Sheltering Effects of Arc-Shaped Floating Breakwaters

An analytical solution was developed to study the sheltering effect on arc-shaped floating breakwaters.The breakwater is assumed to be rigid,thin,vertical,immovable and located in water of constant depth.The fluid domain was divided into two regions by imaginary interface.The velocity potential in each region was expanded by eigenfunctions.By satisfying continuity of pressure and normal velocity across the(imaginary) fluid interface,a set of linear algebraic equations were obtained to determine the unknown coefficients for eigenfunctions.Numerical results,in the form of contour maps of the relative wave amplitude (around) the breakwater,were presented for a range of wave and breakwater parameters.The results show the sheltering effect on the arc-shaped floating breakwater is related to the incident wavelength and the draft of the breakwater.