非均匀海底环境下铰接超大型浮体的水弹性响应分析  

Hydroelastic response analysis of hinged floating structure under inhomogeneous environment

作　　者：夏彩波 位巍 李帅[1,2,3] 付世晓 XIA Cai-bo;WEI Wei;LI Shuai;FU Shi-xiao(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,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]上海交通大学船舶海洋与建筑工程学院,上海200240 [3]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《船舶力学》2021年第5期607-618,共12页Journal of Ship Mechanics

基　　金：国家自然科学基金重大项目(51490674)。

摘　　要：本文采用基于离散模块思想的频域水弹性分析方法,对处于非均匀海洋环境下的铰接超大型浮体的水弹性响应进行分析。该方法首先将连续浮体离散为多刚体系统;然后应用三维势流理论获得各个刚体的水动力系数,将其与弹性梁刚度阵进行耦合,得到浮体在波浪作用下的运动学方程;随后引入铰接约束矩阵,建立铰接超大型浮体在非均匀海底环境下的运动学方程,在频域中求解该方程得到浮体的位移响应;最后利用梁的弯曲理论,获得浮体的弯矩分布以及铰接点处的轴向力和剪力。通过对比不同入射角度、波长和海底条件下浮体的水弹性响应,发现非均匀海底对铰接点的位移和受力有明显的影响。In this paper,a discrete module based frequency-domain hydroelasticity analysis method is used to analyze the response of a very large floating structure(VLFS)with a hinge point under an inhomogeneous environment.Firstly,the continuous floating body is discretized into a multi-rigid-body system.The motion of the floating body is given under the action of waves by coupling the elastic beam stiffness matrix with the hydrodynamic coefficients of each rigid body obtained on the basis of three-dimensional potential theory.Based on the frequency-domain hydroelasticity equation,the hinge constraint matrix is introduced to estab⁃lish the coupling equation of the hinged floating body under the inhomogeneous environment,which is solved in the frequency domain to obtain the displacement response of the floating body.Finally,the bending mo⁃ments of the floating body and the axial and shear forces of the hinge connector are obtained based on the bending beam theory.By comparing the hydroelastic responses of the floating body under different incident angles,wave lengths and seabed conditions,it is found that an uneven seabed has a significant influence on the displacement and force of a hinged joint.

关 键 词：超大型浮体 非均匀海底 铰接 水弹性 

分 类 号：P752[天文地球—海洋科学] U661.1[交通运输工程—船舶及航道工程]