考虑流固耦合时的海洋平台结构非线性动力分析  

Nonlinear Dynamic Analysis of Offshore Platform Considering Fluid-Structure Interaction

作　　者：张学志[1] 黄维平[1] 李华军[1] 

机构地区：[1]中国海洋大学海岸与海洋工程研究所,山东青岛266071

出　　处：《中国海洋大学学报（自然科学版）》2005年第5期823-826,共4页Periodical of Ocean University of China

基　　金：国家杰出青年科学基金资助项目(50325927);青岛市自然科学基金(03-jr-15)资助

摘　　要：采用非线性的Morison方程,建立了考虑流固耦合时的海洋平台非线性动力方程及其时程分析方法。以一固定式导管架平台为算例,计算了考虑流固耦合时的海洋平台浪致振动响应,比较了考虑流固耦合和不考虑流固耦合时海洋平台动力响应的差异。算例表明:在较大的波浪条件下,不考虑流固耦合时的计算结果明显小于考虑流固耦合时的计算结果,因此,偏于不安全。分析认为,在极端海况条件下,考虑流固耦合的分析方法更符合实际情况。A nonlinear dynamic equation which takes into consideration fluid-structure interaction for offshore platforms was put forward by using of nonlinear Morison equation. As an example, the time history response of a jacket offshore platform was analyzed. The wave-induced vibration response of the offshore platform, with and without fluid-structure interaction, was computed and compared. The results show that in extreme waves the dynamic response of the offshore platform without considering fluid-structure interaction is obviously less than that of the offshore platform considering fluid-structure interaction. The analysis shows that this analytical method considering fluid-structure interaction is more reasonable in extreme waves.

关 键 词：流固耦合 海洋平台 非线性动力分析 Morison方程 时程分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]