两层流体中垂直圆柱浮体的辐射水动力特性  

Radiation of Vertically Floating Cylinder in Two-Layer Fluid

作　　者：石强[1,2] 尤云祥[1] 缪国平 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200030 [2]大连船舶重工集团有限公司船舶及海洋工程设计研究所,大连116021

出　　处：《上海交通大学学报》2009年第2期187-192,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(10572092);国家高技术研究发展计划(863)项目(2006AA09Z352);高等学校博士点基金资助项目

摘　　要：基于特征函数匹配方法,建立了两层流体中垂直圆柱浮体水波辐射问题的求解理论,导出了垂直圆柱浮体的附加质量和阻尼系数的计算公式.针对垂荡、横荡与横摇振荡运动模式,计算分析了垂直圆柱浮体的附加质量和阻尼系数特性,并与均匀流体的情况进行了比较.结果表明,在垂直圆柱浮体的某个振荡频率范围内,流体的分层效应对其附加质量和阻尼系数是有显著影响的.The radiation problem of a vertically floating cylinder in a two-layer fluid was considered. The analytic solutions were presented by an eigenfunction expansion method and the computational formulas for the added mass and damping coefficient were given. Three types of radiation problems （sway, heave and roll） were studied and some useful results were obtained, which were compared with the case of a homogeneous fluid. The results indicate that over a certain range of frequencies the density stratification has large effects on the added mass and damping coefficient.

关 键 词：两层流体 垂直圆柱浮体 附加质量 阻尼系数 

分 类 号：U661.3[交通运输工程—船舶及航道工程]