摘要
以某一自升式海洋平台的船体结构位移作为评价依据,基于海事结构设计分析软件SACS和Stokes 5阶波浪理论,从不同浪向角入手进行了动态放大因子(DAF)的计算,比较了不同浪向角下的DAF,并分析了DAF产生差异的原因.结果表明:不同浪向角下DAF随周期比的变化趋势基本相同;水动力的不同将会导致结构位移和加速度的差异;当水动力的1、2阶谐波产生叠加效应时,DAF值增大.
The dynamical amplification factors based on the hull displacement for different wave directions were computed using Stokes＇ 5th order wave theory,which was implemented through the ocean engineering software SACS.Then the DAF values for different wave directions were compared,which were described and explained.Some useful conclusions are got： the DAF curves are very similar for different wave angels,the differences of structural displacement acceleration are attributed to the change of difference of hydrodynamic force,the dynamical amplitude is increased because of the superimposed effects of the 1st and 2nd hydrodynamic harmonics.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2011年第9期1351-1354,共4页
Journal of Shanghai Jiaotong University
基金
上海市博士后科研计划重点项目资助(09R21421600)
关键词
自升式海洋平台
动态放大因子
浪向角
self-elevating offshore platform
dynamic amplification factor
wave direction angle
