半潜式平台在外载荷下的位移计算与仿真

Movement calculation and simulation of semi-submersible platform under external interference

为提高锚泊辅助动力定位系统抵抗外载荷的能力,提出一种计算半潜式平台位移的方法。该方法能够在已知外载荷的情况下,预算平台位移,进而提高控制器对前馈补偿的控制精度。使用该方法比较汇交和非汇交锚泊系统在相同外载荷下平台位移、锚泊线受力及平台首向变化之间的差异,结果表明在进行相关计算时可将锚泊系统简化为汇交系统,进而提高控制器的时效性。所做的研究工作可为锚泊辅助动力定位系统控制器的设计提供参考。

In order to improve the ability of mooring-assisted dynamic positioning system to resist external interference, a method of calculating the movement of semi-submersible platform is proposed. The method can estimate the movement of the platform under the condition of knowing the external interference, so as to improve the control accuracy of the controller for feedforward compensation. Using this method, the difference of platform movement, mooring line tension and platform bow under the same external interference of the intersect and non-intersect mooring system is studied. The results show that the mooring system can be simplified into the intersect system when the correlation calculation is carried out, and the timeli-ness of controller can be improved. The research work can provide reference for the design of mooring-assistant dynamic po- sitioning system controller.