Spar平台垂荡-纵摇与月池内流体垂向振动的耦合运动研究

发布时间：2018-06-01 00:31

本文选题：Spar平台 + 半开口月池　；参考：《振动与冲击》2016年19期

【摘要】：考虑半开口月池,研究桁架式Spar平台垂荡、纵摇、月池内流体垂向振动的耦合运动。建立了平台垂荡-纵摇-月池内流体垂向振动的耦合运动方程,推导了月池内流体对平台垂荡和纵摇运动产生的力和力矩。针对三种工况,即不考虑月池开口、月池开孔率为30%和70%,数值计算了耦合系统的运动响应,分析了月池内流体对平台垂荡和纵摇运动的影响,结果表明,月池内流体对平台主体垂荡有抑制作用,且抑制程度与月池开孔面积有关;对于70%的开孔率,平台垂荡响应RAO曲线在月池流体垂向振动固有周期附近出现高频峰值;70%开孔率时,月池内流体的运动远大于30%开孔率的情况;考虑月池开口后,平台的纵摇响应变化较小。最后,分析了耦合参数对平台及月池内流体运动的影响。
[Abstract]:The coupled motion of fluid vertical vibration in truss Spar platform is studied by considering half-open lunar cell. The coupled equations of motion for the vertical vibration of the fluid in the platform are established, and the forces and moments of the fluid acting on the platform are derived. In view of the three working conditions, that is, the opening rate of the lunar pool is 30% and 70%, the motion response of the coupled system is calculated numerically, and the influence of the fluid in the lunar pool on the motion of the platform is analyzed. The fluid in the lunar pool has an inhibitory effect on the main body of the platform, and the degree of inhibition is related to the opening area of the lunar pool. For 70% of the open hole rate, the RAO curve of the platform response to the vertical vibration of the lunar pool has a high frequency peak value of 70% when the opening rate is 70% near the natural period of the vertical vibration of the fluid in the lunar pool. The movement of fluid in the lunar pool is far greater than 30% of the open hole rate, and the pitching response of the platform changes little when the opening of the lunar pool is considered. Finally, the influence of coupling parameters on the fluid motion in the platform and lunar cell is analyzed.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【分类号】：P751;;TB123

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