基于面元法的半潜式平台在波浪中的运动响应与波浪漂移力计算

Research on motion response and wave drift force of semi-submersible platforms in waves based on panel method

波浪载荷对半潜式平台的运动响应起决定性的作用,并直接影响平台的总强度。基于面元法对不同浪向角下的半潜式平台的波浪漂移力进行了数值计算,通过RAO曲线和RMS值分析了半潜式平台在波浪中的运动响应,考察面元法在计算半潜平台运动响应与波浪漂移力上的适用性。结果表明,面元法能够获得合理的数值预报结果;半潜平台的运动响应在不同波浪条件下有显著区别,纵荡和横荡响应在短波中较为剧烈,在长波中较为平缓,垂荡运动的峰值大于纵荡和横荡运动响应峰值;波浪漂移力/力矩在不同波浪条件下的差异也是显著的。该结论对半潜平台在波浪中的运动响应与波浪漂移力的研究有一定的参考价值。

The wave load plays a decisive role in the motion response of a semi-submersible platform and directly affects the overall strength of the platform.In this paper,the panel method is used to numerically calculate the wave drift force of the semi-submersible platform under different wave directions,and the motion response of the platform in waves is analyzed through the RAO curve and RMS value.In this way,the applicability of the panel method to the motion response and wave drift force of a semi-submersible platform is investigated.The results show that the panel method can obtain reasonable numerical prediction results.The motion response of the semi-submersible platform is significantly different under different wave conditions.The surge and sway responses are more intense in short waves and gentler in long waves.The peak of the heave motion is larger than that of the surge and sway motion responses.In addition,the differences in wave drift force/moment under different wave conditions are significant.The conclusion of this paper has a certain reference value for the research on the motion response and wave drift force of semi-submersible platforms in waves.