摘要
根据线性势波理论,分析了水中截断圆柱体作竖向简谐运动时结构周围的辐射波浪。利用分离变量法,分别得到了含有未知常数的3个流体子域速度势的简谐表达形式,并采用一个较为简单的匹配方法,使其在流体子域的共同边界上满足压力和法向速度的连续条件,于是求解得到速度势,进而可得到由等效附加质量和附加阻尼表示的柱体上、下表面的动水力。本文方法不仅能考虑自由表面波对动水压力的影响,也适用于位于任意水深处的截断圆柱体。算例结果证明了该方法的正确性。
Radiation wave surrounding a horizontally submerged truncate circular cylinder with harmonic heave motion is analyzed by the linear potential wave theory.By means of the method of separation of variables,harmonic expressions of the velocity potential in terms of unknown constants are obtained in three subregions of the domain occupied by the water.A simple matching technique is used to satisfy the continuity of pressure and normal velocities at the common boundary of the subregions.The velocity potential is thus obtained,and consequently,the hydrodynamic force on the side of cylinder expressed by equivalent added mass and damp is determined.The solution presented in paper not only is able to consider gravity wave on the water surface,but also can be applied to truncate circular cylinder submerged in the arbitrary depth of water.Results of examples illustrated the precision of the solution.
出处
《四川建筑科学研究》
北大核心
2010年第3期56-60,共5页
Sichuan Building Science
关键词
线性势波理论
截断圆柱体
动水力
附加质量
附加阻尼
linear potential wave theory
truncate circular cylinder
hydrodynamic force
added mass
added damp
