移动式海上基地连接器的动力特性

Dynamic Characteristics of Mobile Offshore Base Connectors

采用刚性模块柔性连接器模型对移动式海上基地 (MOB)连接器的动力特性进行研究 .在该模型中 ,连接器被模拟成线性弹簧 .采用三维势流理论计算水动力 ,着重分析 8种浪向、5种海况以及 1 2种连接器刚度的改变对 MOB和连接器载荷的影响 .计算结果表明 ,与其他两个方向的连接器载荷相比 ,纵向载荷很大 ,且连接器刚度与浪向角的改变对连接器载荷的影响较大 .因此需要选择合适的连接器刚度并保证 MOB与波浪的夹角小于 45°,同时避免出现不合实际的大载荷 .

Mobile offshore base (MOB) is a multi-purpose logistics base, which can be stationed in coastal or international seas. A rigid module flexible connector (RMFC) model is used to study the dynamic characteristics of MOB connectors. It is assumed that the module stiffness is greater significantly than that of the connector. The connectors are modeled as linear springs. The 3-D source distribution method is adopted to determine the hydrodynamic forces. In order to study the characteristics of MOB connector dynamic responses, the module motions and connector loads are calculated in consideration of 8 wave angles, 5 sea states and 12 connector stiffness cases. The results show that the longitudinal connector loads are much larger than the other components of connector loads. And the changes of connector stiffness or wave angle have great effect on the connector load. It is important to choose a right connector stiffness and keep an angle between the MOB and wave direction less than 45°, and to avoid unrealistic large connector load.