圆盘形弹性浮体在规则波下的频域水弹性响应  

Hydroelasticity of a Circular Floating Elastic Structure under Regular Waves in Frequency Domain

作　　者：李刚 陈永强 张一帆 乔弘 刘博 刘旭东 LI Gang;CHEN Yongqiang;ZHANG Yifan;OIAO Hong;LIU Bo;LIU Xudong(Ocean Energy Engineering Technology Research Institute of CPECC,Guangzhou 511493,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Sanya Yazhou Bay Institute of Deepsea Technology,Shanghai Jiao Tong University,Sanya 572024,Hainan,China)

机构地区：[1]中电海洋能源工程技术研究院,广州511493 [2]上海交通大学海洋工程国家重点实验室,上海200240 [3]上海交通大学三亚崖州湾深海科技研究院,海南三亚572024

出　　处：《船舶工程》2025年第1期140-146,共7页Ship Engineering

基　　金：中电工程集团级课题(2023GFW-0051)。

摘　　要：[目的]为便于求解圆盘形弹性浮体的水弹性响应,[方法]基于离散模块有限元(DMFE)方法,采用径向-周向划分方式将浮体分为若干子模块,使用Shell单元对每个子模块进行离散,并将节点划分为集中质量、边界节点和内部节点等3类。使用三维势流理论计算每个子模块的水动力系数,基于有限元理论计算每个子模块的刚度阵,通过子结构思想和矩阵理论推导集中质量刚度矩阵,并进行水弹性分析。[结果]收敛性分析表明,当结构划分为24个子模块以上时可达到收敛,DMFE计算结果与模态叠加法吻合较好。[结论]研究成果可为圆盘形弹性浮体的水弹性响应求解提供一定参考。[Purpose]In order to facilitate the solution of the water elastic response of a circular floating elastic structure,[Method]based on the Discrete Module Finite Element(DMFE)method,the floating body is divided into several sub modules using a radial circumferential partitioning method.Shell elements are used to discretize each sub module,and the nodes are divided into three categories:concentrated mass,boundary nodes,and internal nodes.The hydrodynamic coefficients of each submodule are calculated using three-dimensional potential flow theory,and the stiffness matrix of each submodule is calculated based on finite element theory.The concentrated mass stiffness matrix is derived through substructure thinking and matrix theory,and subjected to hydroelastic analysis.[Result]The convergence analysis shows that convergence can be achieved when the structure is divided into 24 or more sub modules,and the DMFE calculation results are in good agreement with the modal superposition method.[Conclusion]The research results can provide some references for solving the water elastic response of circular floating elastic structure.

关 键 词：圆盘形弹性浮体 离散模块有限元(DMFE) 水弹性 

分 类 号：TV131.2[水利工程—水力学及河流动力学]