直墙前直立圆柱纵荡问题的研究  

Study on the surge motion of a uniform cylinder in front of a vertical wall

作　　者：滕斌[1] 宁德志[1] 韩凌[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：《水动力学研究与进展（A辑）》2004年第3期331-338,共8页Chinese Journal of Hydrodynamics

基　　金：国家杰出青年基金项目资助(5002594)

摘　　要：　应用镜像原理,将直墙前单个圆柱的纵荡问题转化为双柱在静水中的相向振荡问题,应用速度势的特征展开法,建立了直墙前垂直圆柱纵荡问题的解析解。通过数值计算研究了圆柱与直墙间距离大小、水深等因素对附加质量和辐射阻尼的影响。计算结果表明,直墙前圆柱上的附加质量和辐射阻尼明显不同于开敞水域中单柱纵荡的情况,且随着波数的变化发生振荡。Based on the image theory, the surge motion of a cylinder in front of a vertical wall is transformed into the problem of two cylinders surging anti-directionally. The transformed problem is solved by an analytical method based on eigenfunction expansion. Numerical experiment has been performed in order to examine the influence of the distance between the cylinder and the vertical wall and water depth on the added mass and radiation damping of the cylinder. The calculation shows that the added mass and radiation damping of the cylinder in front of a vertical wall are evidently different from those of the cylinder in open water. They oscillate with wave number, and the oscillating frequency increases with the increase of the distance between the cylinder and the wall.

关 键 词：附加质量 辐射阻尼 纵荡 圆柱 直墙 

分 类 号：O353.2[理学—流体力学]