（新加坡国立大学土木与环境工程系， 肯特岗 119260）

［摘要］浮舟式超大型浮式结构(VLFS)是一种漂浮于海面上的巨型工作平台，其具有表面积大、吃水较浅的特点。在波浪荷载作用下VLFS处于弹性工作状态，这种波浪与结构间的流固耦合作用被称流体弹性。为了评估波浪荷载下VLFS 运动及应力状态，需要在设计过程中对其进行流体弹性分析。基于频域方法给出了包括铰接式和任意外形在内的VLFS的相关流体弹性分析公式，并且讨论了连接方式及平面形状对减小VLFS动力响应的影响。同时也研究了海床倾斜情况与结构动力响应间的关系。

［关键词］超大型浮式结构; 流体弹性; 耦合作用; 动力响应

中图分类号：U661.4    文献标识码：A    文章编号：1002-848X(2014)07-0021-06

Hydroelastic analysis of very large floating structures in frequency domain

C.M.Wang, R.P.Gao, M.M.Pathak

（Department of Civil and Environmental Engineering, National University of Singapore, Kent Ridge 119260, Singapore）

Abstract: Pontoon-type very large floating structures (VLFS) are giant plates resting on the sea surface. As these structures have a large surface area and a relatively small depth, they behave elastically under wave action. This type of fluid-structure interaction has being termed hydroelasticity. Hydroleastic analysis is thus necessary to be carried out for VLFS designs in order to assess the dynamic motion and stresses due to wave action. The mathematical formulation for the hydroelastic analysis of VLFS in the frequency domain was presented. Hydroelastic responses of articulated VLFS and arbitrary shaped VLFS were also presented. The effect of articulation and plan shape on mitigating the structural response of VLFS was discussed. In addition, the effect of a sloping seabed on the structural response of VLFS was investigated.

Keywords: very large floating structure(VLFS); hydroelasticity; fluid-structure interaction; dynamic response

作者简介：王建民，教授，新加坡国立大学土木与环境工程系，注册结构工程师，新加坡工程院研究员，新加坡工程师协会会员，结构工程师协会会员，IStructE新加坡地区主席。主要研究方向为结构稳定、结构抗震、结构优化、纳米结构和片状结构、浮体结构。Email: ceewcm@nus.edu.sg。