中文摘要：

柱体受内波作用力的数值模拟大多针对圆柱展开,方柱在内波环境下受力特性研究较少。借助三维数值波浪水槽,采用大涡模拟（LES）技术研究了内孤立波的产生、传播及其对不同形状柱体的受力特性。对比分析了内孤立波波幅对圆柱和方柱受力的影响规律。研究表明,在分层流环境下,随着内孤立波波幅的增大,圆柱和方柱所受的水平作用力均增大;相同波幅情况下,无论在上层或下层水体,方柱表面的压力分布更不均匀,迎流面与背流面的压差更大,从而导致方柱相较于圆柱会受到更大的水平作用力。

英文摘要：

Most previous numerical studies merely focused on Internal Solitary Wave（ ISW） forces acting on a circular cylinder,and only a few studies have been conducted on ISW forces acting on a square cylinder. A 3-D numerical wave flume is used to investigate the generation and propagation of ISWs. The ISW forces acting on circular and square cylinders are examined through a Large-Eddy Simulation（ LES） approach. ISW force behaviors in the circular and square cylinders are studied at various ISW amplitudes. Results show that the forces acting on the circular and square cylinders increase with increasing amplitudes. At the same amplitude,the ISW forces exerted on the square cylinder are larger than those exerted on the circular cylinder because of the more uneven pressure distribution and larger differential pressure between the front and rear of the square cylinder.