摘要
以由不同直径、杆件方向和长度的圆柱形水下杆件构成的桁架式近海结构物为对象,提出了考虑流固耦合的结构物波浪载荷和动力响应的数值分析方法:首先逐一计算组成桁架式结构的每一杆件的波浪力,然后对这些单一杆件的波浪力进行叠加来得到结构物的整体波浪载荷,同时利用时域分析方法求解结构物的动力响应。算例表明:与考虑流固耦合情况下的平台波浪载荷和动力响应计算结果对比,忽略辅助杆件响应贡献的计算结果与之存在较大差异;不考虑流固耦合情况下的计算结果在结构物的固有周期附近与之差异较大,在远离固有周期的区间则差别不大。对平台进行分析时有必要记入辅助杆件的响应贡献,并且考虑流固耦合的影响。
A truss-type offshore structure, which consists of different cylindrical members with different diameters, member orientations and lengths, is taken as the research object. A numerical analysis method about wave load and dynamic response which considering fluid-structure interaction is put forward. The wave forces on every single cylinder are first calculated one by one, and then they are superimposed to obtain a comprehensive wave load on the integral structure. At the same time, the dynamic responses of the structure are solved by using time history analysis method. The numerical results show that comparing with the wave load and dynamic responses of integral platform considering fluid-structure interaction, the results of that without considering auxiliary cylindrical members＇ response contribution are much different, the results of that without considering fluid-structure interaction are much different under structure＇s natural period, a little different on the interval which is away from structure＇s natural period. Considering auxiliary cylindrical members＇ response contribution and fluid-structure interaction in platform analysis is necessary.
出处
《海洋技术》
北大核心
2009年第4期117-122,共6页
Ocean Technology
关键词
流固耦合
桁架结构
波浪载荷
动力响应
导管架平台
fluid-structure interaction
truss-type structure
wave load
dynamic response
jacket platform
作者简介
郁苗（1984-），女，硕士研究生，主要从事船舶与海洋工程水动力学研究。
