波浪对透空外壁双筒柱的绕射  

Wave diffraction from a vertical cylinder with two columns and porous outer wall

作　　者：滕斌[1] 韩凌[1] 李玉成[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《海洋工程》2001年第1期32-37,共6页The Ocean Engineering

基　　金：国家自然科学基金重点资助项目! (19732 0 0 4) ;国家杰出青年基金资助项目! (5 0 0 2 5 92 4) ;国家自然科学基金与香港研究资助局

摘　　要：应用透空壁内流体速度与两壁间压力差成正比的线性模型 ,建立了外壁透空的双筒圆柱对波浪绕射的解析解。通过数值计算研究了外壁透空率的大小、内外柱半径之比等因素对桩柱上总波浪作用力和波面高度的影响。数值结果表明圆柱外壁透空系数的增加 ,将明显地降低圆柱周围的波浪高度和圆柱上的波浪力 ;内外柱径之比的大小对波浪力和波高的最大值无太大影响 。Based on a linear model of the pressure difference and the fluid velocity inside a porous wall, an analytical solution has been established for wave diffraction from a cylinder with an outer porous column and an inner solid column. A numerical experiment has been carried out to examine the effects on the wave force on a porous two-column cylinder and the wave elevations outside the cylinder due to the porous character of the outer coulumn and the ratio of radii of the inner and outer columns. The numerical results show that the increase of the porous coefficient of the outer column of a double-coulumn cylinder will reduce the wave elevation around the cylinder and the wave load on it. The ratio of the radii of the inner and outer columns does not affect maximum values of wave forces and wave heights very much, but does affect the position of suddenly falling range of the wave force and the oscillating period of wave heights.

关 键 词：波浪绕射 波浪力 透空结构 数值计算 防波堤 透空系数 海岸工程 

分 类 号：P731.22[天文地球—海洋科学]