Analysis of heave motions of a truss spar platform with semi-closed moon pool
Analysis of heave motions of a truss spar platform with semi-closed moon pool
复制标题
DOI：
10.1016/j.oceaneng.2014.09.048
复制
发表时间：
2014-12
影响因子：
5
通讯作者：
Li-qin Liu;A. Incecik;Yongheng Zhang;You-gang Tang
中科院分区：
文献类型：
--
作者：
Li-qin Liu;A. Incecik;Yongheng Zhang;You-gang Tang
本文介绍了桁架 Spar 平台在规则波浪中的升沉运动，考虑了平台运动与月池中水之间的动态耦合。对于半封闭月池的晶石平台，水可以通过月池底部的导流板自由流动。如果使用顶部张力立管系统，月池内的水质量与平台本身质量相当。那么月池水对平台运动的影响也不容忽视。在该论文提出的研究中，考虑到月池完全封闭、或30%或70%开放，推导了Spar平台的升沉运动和月池中水的垂直运动的2-DOF（自由度）动力耦合方程。结果表明，月池中水的运动对Spar平台的升沉运动有显着影响。还进行了参数研究，以找出底板开口率对耦合运动的影响。最后进行模型实验验证数值计算结果。
This paper presents the heave motion of a truss Spar platform in regular waves considering the dynamic coupling between the motions of the platform and water in the moon pool. For a spar platform with semi-closed moon pool, water can flow freely through the guide plate at bottom of the moon pool. The mass of water inside the moon pool is comparable to the platform mass itself if the top tension riser system is used. Then the effect of the moon pool water on the motions of the platform should not be ignored. In the study presented in the paper, a 2-DOF (Degree of Freedom) dynamic coupling equations of the heave motions of the spar platform and the vertical motions of water in the moon pool were derived considering that the moon pool is totally closed, or 30% or 70% open. The results show that motions of water in the moon pool significantly affect the heave motions of the spar platform. Parametric study was also carried out to find the effect of the ratio of opening of the bottom plate on the coupled motions. Finally the model experiments were carried out to validate the numerical calculations.