Analytical Study on Wave Diffraction from a Vertical Circular Cylinder in Front of Orthogonal Vertical Walls     

宁德志滕斌  宋向群 《海洋通报(英文版)》2005,7(1):1-9

In this paper, the principle of mirror image is used to transform the problem of wave diffraction from a circular cylinder in front of orthogonal vertical walls into the problem of diffraction of four symmetric incident waves from four symmetrically arranged circular cylinders, and then the eigenfunction expansion of velocity potential and Grafs addition theorem are used to give the analytical solution to the wave diffraction problem. The relation of the total wave force on cylinder to the distance between the cylinder and orthogonal vertical walls and the incidence angle of wave is also studied by numerical computation.  相似文献   

正交直墙前直立圆柱的波浪绕射的解析研究     

宁德志  滕斌  宋向群 《海洋科学进展》2004,22(1):29-35

应用镜像原理,将正交直墙前单个圆柱的波浪绕射问题,转化为4个对称布置圆柱的4向入射波浪的绕射问题。然后应用速度势的特征展开方法和Graf加法定理,建立了正交直墙前垂直圆柱的波浪绕射解析解。通过数值计算研究了圆柱与正交直墙间距离大小、波浪入射角等因素与圆柱上总波浪作用力的解析关系。  相似文献   

高桩码头地震惯性力计算     

连竞  宋向群 《海洋工程》1992,(2)

本文采用弹性柱(桩)支承空间刚体(码头上部结构分段)的力学模型,分析高桩码头的自由振动特性,并按反应谱方法给出计算水平地震惯性力和惯性扭矩的解析表达式。最后结合例题指出惯性扭矩的作用不容忽视。  相似文献