波浪场中浮冰摇荡运动特性  

Investigation of the motion response of an ice floe in waves

作　　者：朱仁庆 张曦 李志富 ZHU Renqing;ZHANG Xi;LI Zhifu(College 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：《哈尔滨工程大学学报》2021年第8期1140-1146,1242,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52071162,51709131,51579120).

摘　　要：针对冰缘区波浪与海冰相互作用问题,本文在波高一定的情况下,模拟了浮冰在一系列不同波长的规则波中垂荡和纵摇运动。通过关注的波浪冲洗冰体表面现象,其中浮冰运动受到波浪冲洗的干扰不可忽略,对比分析了浮冰在有/无波浪冲洗下的运动响应。利用计算流体力学方法建立三维数值波浪水池,通过有限体积法离散求解流体控制方程,采用VOF法捕捉自由液面,通过重叠网格技术实现浮体运动,同时通过计算流体作用于浮体的合力与合力矩,求解浮冰运动控制方程更新浮冰运动。计算结果表明:当波长较小时,波浪冲洗冰现象较明显,其对浮冰运动的抑制作用也较强。本文的数值模型对北极工程开发提供了一定的参考价值。The heave and pitch motions of an ice floe in regular waves are studied for different wavelengths with a fixed wave height to understand the interaction between waves and ice floes in the marginal ice zone.Overwash caused by waves is simulated and its impact on the floe motion is investigated.The motion response of floes subjected to overwash and those not subjected to overwash is compared.In this paper,a three-dimensional numerical wave tank(NWT)is established using computational fluid dynamics(CFD)technology.By imposing a specified velocity condition on the inlet boundary,the wave is generated.The finite volume method(VOF)is used to solve fluid governing equations.The floe motion is modeled by an overset grid.Meanwhile,the resultant force and resultant moment of the fluid acting on the floating ice are calculated,and the equations of the ice motion are solved to update the floe motion.The results show that the effect of overwash is more pronounced when the wavelength is small;that is the ice motion is significantly suppressed.The applied numerical model could provide valuable information for Arctic engineering purposes.

关 键 词：浮冰 冰缘区 波浪冲洗 运动响应 数值模拟 有限体积法 流体体积函数法 重叠网格 

分 类 号：U661.1[交通运输工程—船舶及航道工程]