内波孤立子的非波导荷载计算  

Load Calculation of Solitary Waves for Non-Wave-Guide

作　　者：沈国光[1] 叶春生[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《天津大学学报》2005年第12期1046-1050,共5页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(50179024)

摘　　要：为全面分析不同形态内波的危害,将孤立子视为非波导内波的一种情况,以70 m水深浅海Holmboe密度分层和5 m直立圆柱为例,应用内波垂向结构Sturm-Liouville控制方程的模态分析方法计算了不同模态下的孤立子内波荷载．结果表明,孤立子内波具有阵发性和与模态相关的剪切,其荷载较波导内波的情况大一个量级,是形成内波危害的主要形式．In order to thoroughly analyze the damage of different type of internal waves, internal solitons are considered as non-wave-guide internal waves in calculating their loads imposed on vertical cylinder for different modes. The mode analysis method of the Sturm-Liouville governing equation of internal waves is used in the calculation which takes the depth of shallow water as 70 m, and the diameter of cylinder as 5 m. Density profile of Holmboe pattern is adopted in the paper. The results show that internal solitons feature suddenness and shearing related to internal wave mode, and the loads of solitons are greater than those of wave-guide internal waves by one order. Therefore, internal solitary waves are one of the main types of internal wave damage.

关 键 词：内波荷载 分层流体 孤立波 非波导 

分 类 号：O353.2[理学—流体力学]