内波作用下海洋立管动力响应数值模拟系统

Numerical simulation system of dynamic response of marine riser under internal wave

针对目前内波对海洋立管作用研究缺乏的现状,基于MATLAB开发出内波作用下海洋立管动力响应数值模拟系统NSDRI 1.0。该系统主要考虑内孤立波作用,基于m Kd V理论求解内孤立波,使用改进的Morison方程计算作用在海洋立管上内孤立波的荷载,进而求解出立管的水平位移以及应力响应。该系统界面清晰友好,操作简单,适用于顶张力立管。选取一定参数,使用该系统进行计算,并将计算结果与已发表的成果进行对比,发现结果较为吻合,从一定程度上验证了系统的可行性,可对立管的设计提供借鉴。

Due to the lack of the study on marine riser under internal wave, Numerical Simulation System of Dynamic Response Under Internal Wave （ NSDRI 1.0） based on MATLAB is developed. The effect of internal solitary wave is mainly considered and the theory of mKdV is used to solve internal solitary wave. It uses the modified Morison equation to calculate the load created by internal wave on marine riser. And then, we can get the displacement and stress of marine riser under the internal wave. The system is suitable for top tensioned riser and the interface of the system is so concise and easy to use. The results calculated by this system are consistent with other achievements which have been published. The feasibility of this system is verified to some degree. And the study results may provide some reference to the design of marine riser.