内孤立波作用下潜体载荷特性数值模拟研究  

Numerical investigation on load characteristics of a submergedbody under the action of internal solitary waves

作　　者：冀珂 郅长红 尤云祥[1,2] JI Ke;ZHI Changhong;YOU Yunxiang(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Yazhou Bay Institute of Deepsea Science and Technology,Shanghai Jiao Tong University,Sanya 572000,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]上海交通大学三亚崖州湾深海科技研究院,三亚572000

出　　处：《江苏科技大学学报(自然科学版)》2025年第1期8-16,共9页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：中国博士后科学基金项目(2021M702127)。

摘　　要：内孤立波广泛存在于实际海洋中,由于其诱导的水平流速大,对海洋结构物水动力性能的影响不可忽视.近年来,针对内孤立波对浮式海洋结构物作用的载荷理论逐步完善,但对于内孤立波与潜体的作用特性有待进一步研究.文中将Morison公式和Froude-Krylov公式相结合,建立了内孤立波作用下水下潜体载荷的一种简化理论模型.基于流体体积(volume of fluid,VOF)方法,结合3类内孤立波理论模型,设计速度入口函数,开展内孤立波与水下潜体相互作用数值模拟研究,结合文献中的模型实验结果,对数值模拟方法的可靠性进行了验证.通过系列CFD模拟,结合水下潜体内孤立波载荷简化理论模型,获得了内孤立波作用下潜体模型拖曳力及惯性力系数的拟合公式.该简化理论模型对研究内孤立波作用下水下潜体的载荷特性具有一定的参考价值.Internal solitary waves exist widely in marine environment,and their effects on marine structures cannot be ignored because of their high velocity and energy.In recent years,load theories of internal solitary waves on floating marine structures has been gradually improved,while the load characteristics of submerged bodies under internal solitary waves needs to be further considered.In this paper,the Morison formula and Froude-Krylov one are combined to establish a simplified theoretical model of internal solitary wave load on a submerged body.Based on the volume of fluid(VOF)method and integrating three theoretical models of internal solitary waves,this study designs velocity inlet functions to conduct numerical simulations investigating the interaction between internal solitary waves and submerged bodies.Validation of the reliability of the numerical simulation method is performed by comparing the results with experimental data from the literature.Through a series of computational fluid dynamics(CFD)simulations and incorporation of a simplified theoretical model for the loads induced by internal solitary waves on submerged bodies,fitted formulas for drag and inertia coefficients of the submerged body model under the influence of internal solitary waves are obtained,which have certain reference value for simulating the load characteristics of underwater vehicles due to internal solitary waves.

关 键 词：内孤立波 潜体 Morison公式 惯性力 拖曳力 Froude-Krylov力 

分 类 号：U661.1[交通运输工程—船舶及航道工程] O352[交通运输工程—船舶与海洋工程]