基于完全非线性边界元方法的楔形液舱入水问题研究  

Water entry of a wedge tank into water based on fully nonlinear boundary element method

作　　者：王宁 鹿玮川 孙士艳 WANG Ning;LU Wei-chuan;SUN Shi-yan(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《舰船科学技术》2022年第6期29-33,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51809123)。

摘　　要：基于不可压缩势流理论研究二维楔形液舱入水问题。采用液舱内部载有等质量水与冰对比方法,研究液舱在入水过程中内部流体运动对液舱运动的影响。采用时域内的边界元法研究此问题,建立2个独立的边界元计算域,第一个是模拟液舱内部流体的内部计算域,另外一个是模拟外部开敞流体的计算域。前者在物理坐标系下求解,后者在拉伸坐标系下求解。采用辅助函数方法求解附加质量和水动力,并建立内部流体载荷、外部流体载荷和液舱壳之间的耦合运动方程,研究三者之间的相互影响。The hydrodynamic problem of a two dimensional wedge tank filled with liquid entering a calm water surface is analysed based on the incompressible velocity potential theory.The motion effect of inner liquid on the entry process is investigated through comparison with the result containing equivalent solid mass or the liquid being frozen.The problem is solved through the boundary element method in the time domain.Two separated computational regions are constructed.One is the inner domain for the internal liquid,and the other is the outer open domain for the open water.The former is solved in the physical coordinate system,and the latter is solved in a stretched coordinate system.The solutions of two separated domains are connected through the motion of the body with the help of the auxiliary function method,and in-depth discussions on the coupling effect between them are provided.

关 键 词：入水 完全非线性边界条件 边界元法 双计算域 

分 类 号：U661.4[交通运输工程—船舶及航道工程]