波浪对直墙前垂直圆柱的绕射  

Wave diffraction from a uniform cylinder in front of a vertical wall

作　　者：滕斌[1] 宁德志[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》2003年第4期48-52,共5页The Ocean Engineering

基　　金：国家杰出青年基金资助项目(50025924)

摘　　要：应用映像原理,将直墙前单个圆柱对波浪的绕射问题,变换为双柱对双向波浪的绕射问题,应用速度势的特征展开方法,建立了直墙前垂直圆柱对波浪绕射的解析解。通过数值计算研究了圆柱与直墙间距离大小、波浪入射角等因素对圆柱上总波浪作用力的影响。计算结果表明,直墙前圆柱上的波浪力将成倍地增加,且随着波数的变化而发生振荡。Based on the image theory, the wave diffraction from a cylinder in front of a vertical wall is transformed into the problem of diffraction of bidirectional incident waves from two cylinders. The transformed problem is solved by using an analytical method based on eigenfunction expansion. Numerical experiments have been performed to examine the effects of the distance between the cylinder and the vertical wall, and the wave incident direction on the wave force on the cylinder. The calculation shows that the force on the cylinder in front of a vertical wall is several times of that on the cylinder in open water. The force on the cylinder in front of a wall oscillates with wave number, and the oscillating frequency increases with the increase of the distance between the cylinder and the wall.

关 键 词：波浪绕射 波浪力 圆柱 直墙 映像原理 速度势 

分 类 号：TV139.2[水利工程—水力学及河流动力学]