波流组合作用下SPAR平台垂荡-纵摇耦合运动研究

探讨SPAR平台在波流组合作用下的运动响应机理。运用Matlab程序分析了SPAR平台产生内共振的运动过程,运用刚体动力学理论建立了平台垂荡-纵摇耦合方程,对波流共同作用下Spar平台的垂荡、纵摇运动进行数值模拟,结果表明:流的加入对于内共振的影响并不明显;同时采用AQWA软件研究了流的加入对于纵荡二阶慢漂力的影响,研究发现,当波流同向时能大大增加Spar平台的纵荡运动,而波流反向时却能明显削弱纵荡运动。本文研究成果对于指导深海浮式结构设计开发具有一定的理论借鉴作用。

Study on Heave-Pitch Coupled Motion of SPAR Under Combined Wave and Current Load

The movement response mechanism of SPAR platform under wave and current is discussed in this paper.The Matlab is used for movement analysis of SPAR platform under the condition of internal resonance.The equations of the coupled heave-pitch motions are established by rigid body dynamics theory.The program is also used for numerical simulation of SPAR platform’s heave and pitch motions under wave and current.It can be seen that the influence of the internal resonance is not obvious although the current is added.At the same time,the influence of second order drift force under current is studied by AQWA.It has been found that when the wave and current are in the same direction,the surge motion will increase strongly,when they are in opposite direction,the surge motion will reduce obviously.The research results can give certain theory reference for the design and development of deep-sea floating structures.