基于CFD-FEM的浮式结构水弹性响应数值模拟  

Numerical simulation of hydroelastic responses of floating structure based on CFD-FEM method

作　　者：刘一 朱仁庆 程勇[1] 谢彤 李润泽 LIU Yi;ZHU Renqing;CHENG Yong;XIE Tong;LI Runze(College of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212001,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212001

出　　处：《海洋工程》2020年第6期24-32,共9页The Ocean Engineering

基　　金：国家自然科学基金项目(51179077)。

摘　　要：开发并验证了一种基于CFD-FEM耦合的弹性浮体水弹性响应计算模拟方法。采用CFD方法建立黏性数值水池模拟非线性波浪,弹性浮板进行有限元离散,并在交界面进行数据交互实现耦合计算;通过与水池试验数据和三维板理论在各种波浪环境下的浮体垂向位移结果对比,证实CFD-FEM耦合方法的有效性。并进一步研究了浮板的厚度、入射波波幅和浮板的三维效应对浮板水弹性响应的影响。结论表明,波幅的增加会加剧弹性浮板的水弹性响应,浮板各点处的垂向位移随波幅的增加而增大;当浮板厚度改变时,不同厚度浮板自由端处的垂向位移差异较小,而在中部等位置处,厚度对浮板的水弹性响应有较大的影响。In this study,a simulation method for predicting hydroelastic response of floating elastic plate which couples CFD and FEM is developed and validated.The CFD method is used to establish the viscous numerical tank for nonlinear wave,and the elastic plate is finite element discrete,then the data is exchanged at the interface between tank and plate.By comparing the prediction with 3D panel method and tank test result under various wave conditions in terms of vertical displacement,the effectiveness of CFD-FEM coupling method is verified.Finally,this method is applied to analyze influences of design parameters for hydroelastic response.The conclusion shows that the increase of the wave amplitude will aggravate the hydroelastic response of the floating plate.The vertical displacement of the floating plate rises with the wave amplitude.There is a small difference in the vertical displacement at fore-end and back end when the thickness of the floating plate changes.However,the thickness of plate has a greater impact at the mid-position on the hydroelastic response.

关 键 词：非线性波浪 CFD-FEM 水弹性响应 超大型浮体 

分 类 号：U661.1[交通运输工程—船舶及航道工程] P751[交通运输工程—船舶与海洋工程]