浮式直立圆柱体辐射问题研究  

Study on radiation problem for a floating vertical cylinder

作　　者：王冬姣[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《船舶力学》2011年第10期1121-1126,共6页Journal of Ship Mechanics

基　　金：广东省自然科学基金资助项目(7035774)

摘　　要：采用特征函数展开及边界匹配的方法求解流场各子区域速度势的展开系数,得到了浮式直立圆柱体在静水面作纵荡,垂荡和纵摇运动时引起的水动力系数,分析了所取截断项数对计算结果的影响,所需最少截断项数取决于水深半径比和吃水半径比。讨论了水深对水动力系数的影响,得到了可近似表示深水情况的水深半径比。Hydrodynamic coefficients due to radiation respectively by surge,heave and pitch motions on calm water for a floating vertical circular cylinder are derived, and the unknown expansion coefficients of the velocity potentials in each fluid region are solved by the method of matched eigenfunction expansions. The influence of the truncation terms on the numerical results is discussed.The number of terms needed depends on the depth and draft to radius ratios. The influence of the water depth on the hydrodynamic coefficients is also investigated,and the corresponding ratio of the depth to radius which represents approximately the infinite depth case is obtained.

关 键 词：直立浮式圆柱体 辐射 截断项数 

分 类 号：O353.2[理学—流体力学]