超大型浮动机场稳定性及非线性动力响应特性研究

项目名称： 超大型浮动机场稳定性及非线性动力响应特性研究

项目编号： No.11472100

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： 徐道临

作者单位： 湖南大学

项目金额： 92万元

中文摘要： 海上浮动机场是立足国家海洋权益维护和深海资源开发的战略需求，具有先导性的重大高端海洋工程装备。它具有结构大尺度、多模块组合、刚柔连接、流固耦合等特点，是一个典型链式拓扑结构的非线性振子网络系统。本项目从非线性网络动力学这一新视角，构建超大型海上浮动机场的网络结构动力学模型。基于振幅死亡机理研究海上浮动机场的动力学稳定性，分析耦合强度、耦合函数、波浪参数、非均匀波浪环境、系泊系统力学特性对系统稳定性临界条件的影响。研究在复杂波浪环境中海上浮动机场的响应阶跃现象、网络协同动力学效应、模块间能量传递规律及复杂非线性动力响应特性，为超大型海上浮动机场的安全性设计提供新的理论依据。在此研究基础上建立起来的非线性网络结构动力学方法可以应用于各类深远海大型浮式平台的非线性动力响应预报，具有十分广泛的应用前景。

中文关键词： 超大型海上浮动机场；振幅死亡；网络动力学；非线性响应特性

英文摘要： The very large floating airport is a cutting-edge platform in ocean engineering that emerged from the national strategic goals in naval defence and natural resource development. It is a typical nonlinear network system with a chain-like topological structure because of its massive size, flexibly connected multiple modules and hydro-elasticity effects. This project utilises the new theory in network dynamics for floating airport modelling. The study will involve the global stability of this floating airport based on the concept of amplitude death, and critical conditions, which is affected by coupling strengths and functions, waves and uneven sea conditions, as well as mooring system. Further investigation involves nonlinear dynamic characteristics of the airport network, including the phenomena of jump, synchronisation, energy transformation and possibly stochastic resonance, in order to provide a theoretical guidance for the engineering safety design. The methodology developed from this project could be applied to nonlinear dynamics forecasting of many other types of multi-module floating structures in ocean engineering.

英文关键词： Very large floating airport;Amplitude death;Network dynamics;Nonlinear dynamic characteristics