畸形波作用下的浮式结构水弹性响应分析  

Hydroelastic response of floating structure in freak waves

作　　者：朱仁庆 谢彤 刘一 苑中排 ZHU Ren-qing;XIE Tong;LIU Yi;YUAN Zhong-pai(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：《船舶力学》2022年第10期1473-1484,共12页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51179277)。

摘　　要：本文基于时域下CFD-FEM方法,在三维粘性数值水池中建立畸形波浪与弹性浮体相互作用的耦合数值模型。基于JONSWAP波浪谱的组合聚焦模型,采用推板造波方法,模拟数值水池中畸形波波浪的生成。流场区域采用CFD方法求解,得到流场中的速度场与压力场的变化;浮体结构采用FEM方法进行计算,获得结构内各节点的垂向位移变化情况,数值方法可以准确地模拟所期望的畸形波以及分析弹性浮板的水弹性响应。计算结果表明,聚焦波的浪向、聚焦位置和频带宽度对浮板的水弹性响应均有较大影响。In this paper,based on the CFD-FEM method in time domain,a coupled numerical model of the interaction between freak waves and a floating elastic plate was established in a three-dimensional viscous numerical tank.Based on the combined wave focusing model of JONSWAP wave spectrum,the piston-type wave-making method was adopted to simulate the generation of freak waves in a numerical wave tank.The flow field was simulated by CFD method to obtain the changes of the velocity field and the pressure field in the flow field.The floating structure was calculated by FEM method to obtain the vertical displacement of each node in the structure.The numerical method could accurately simulate the expected freak waves and an⁃alyze the hydroelastic response of the elastic floating plate.The results show that the wave direction,focusing position and frequency band width of the focusing wave have a great influence on the hydroelastic response of the floating plate.

关 键 词：畸形波 超大型浮体 水弹性响应 CFD-FEM 数值波浪水池 

分 类 号：U661.1[交通运输工程—船舶及航道工程]