分层海洋中超大型浮式结构物的耦合动力特性研究

项目名称： 分层海洋中超大型浮式结构物的耦合动力特性研究

项目编号： No.11472166

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 卢东强

作者单位： 上海大学

项目金额： 75万元

中文摘要： 海洋超大型浮式结构物作为海洋资源开采基地和海上浮式机场的重要载体，日益受到世界各国的重视。我们南海资源丰富，但内波出现频繁，大振幅内波对浮式结构物构成了威胁。由于超大型浮式结构物在水平方向的尺度远远大于垂向尺度，其柔性变形不可忽略，因此，海洋与超大型结构物的耦合动力学行为研究是在分析流体水动力、结构物弹性力和惯性力的基础上。本项目旨在探索超大型浮式结构物在表面载荷、周边波浪等外界激励下的水弹性动力学特性，以渐近分析法和同伦分析法等半解析方法为主要手段，并辅以数值计算，研究超大型浮式结构物的响应挠度、应力的演化和分布；着重阐明载荷非定常性、海洋分层性、波浪非线性和结构复杂性等物理因素对超大型浮式结构物水弹性动力特性的耦合影响。项目研究成果将为飞行器在大型浮式结构物起降、车辆的运行安全提供动力学建议，同时为超大型浮式结构物的设计和维护提供参考。

中文关键词： 内波；非线性波；水动力；流固耦合；水弹性

英文摘要： As an important medium for the base of ocean resource exploition and a floating airport,the very large floating structure (VLFS) has been attacting more and more attention in the world. The ocean resources in the South China Sea is very abundant, however the large-amplitude internal waves frequently occur there, which is a threat to the floating marine structures. Since the horizontal scales are much larger than its vertical scale, the flexible deformation of a VLFS is not neglectable. Therefore the study on the coupled dyanamics of the large marine structure and the ocean is based on the analysis among the hydrodynamics force of the fluid, the elastic and inertial forces of the structure. The aim of this project is to study the hydroelastic characteristics of a VLFS subjected to surface loadings and surrounding wave actions, mainly by means of asymptotic analysis and the homotopy analysis methods and with the aid of numerical computation. The distribution and evolution of the deflection and the stress of the VLFS will be investigated, with an emphasis on the combined effects of loading's unsteadiness, the ocean's inhomogeneity, the wave's nonlinearity, and the structure's complexity on the hydroelastic response of a VFLS. The research ouputs of this project will not only show some suggestions for the safe operation of an aircraft's landing and taking off and a vehicle moving on a VLFS, but also provide some references for the design and maintance of a VLFS.

英文关键词： internal waves;nonlinear wave;hydrodynamic force;solid-fluid coupling;hydroelasticity