碰撞事故时超大型浮体模块连接处荷载特性研究

摘要

Accurate assessment of the connector loads characteristics has an important engineering significance for the hydrodynamic design and structural safety of the very large floating structure (VLFS). In this paper, the combined effects of ship impact, wind, wave and current load are consid-ered to study a semi-submersible VLFS consisting of five modules. The AQWA software is used to carry out the numerical calculation for loads characteristics of connectors. The ship impact load is simplified as a rectangular pulse, and the steady wind, steady flow and JONSWAP spectrum are used to discuss the influence of the ship impact angle, the impact position, the environmental load and oth-er factors on the connector loads characteristics. The studied results can provide some basis for the design and strength calculation of the VLFS.%精确评估模块连接处荷载特性对超大型浮体的水动力设计及结构安全性研究具有重要的工程意义。文章以5模块半潜式超大型浮体为研究对象，考虑碰撞荷载和风、浪、流环境荷载的联合作用并采用AQWA软件对超大型浮体模块连接点处的受力特性开展了数值计算。船舶碰撞荷载简化为矩形脉冲，采用定常风、定常流以及JONSWAP波谱，探讨了船舶碰撞角度、撞击位置、环境荷载等因素对模块连接点受力特性的影响。该文的研究成果可为事故荷载作用时超大型浮体连接器结构设计和强度计算提供一定依据。