LNG加注船旁靠作业时的水动力性能试验

Model Test of Hydrodynamics Behavior of Side-By-Side LNG Bunkering Operation

针对液化天然气(Liquefied Natural Gas,LNG)加注船旁靠9 400TEU集装箱船进行加注作业时两船间的复杂水动力响应问题开展水池模型试验。研究风、浪、流同向下加注船与受注船的运动响应和相对运动特性及两船之间系泊缆与护舷的受力情况。结果表明:在相同海况下,LNG加注船的运动较为明显,处于较不利状态;两船的纵荡运动和横荡运动基本一致,LNG加注船在纵荡和艏摇运动方面以高频运动居多;在两船间的相对运动中,相对纵荡运动占主导地位,相对垂荡运动居中,相对横向运动最小。系泊缆绳和橡胶护舷受力满足相关指南的要求,系泊系统是安全的。该研究可为LNG海上加注作业提供相关技术依据。

The model test is performed to study the complex hydrodynamics between an LNG（Liquefied Natural Gas） bunker and a 9 400 TEU container vessel when they are in side-by-side bunkering operation. The motion responses, relative move- ments and the forces on connection lines and fenders between two vessels under the combined action of wind, wave and current in worst case are studied. The results show that the motion of the two ships keeps synchronous while the motion of the LNG bunker is more intense. The surge and sway movement of 9 400 TEU container ship and LNG bunker are basically same. But the surge motion and yaw motion of LNG bunker have wave-frequency characteristics. The relative surge movement is the lar- gest and the relative sway movement the smallest. The forces on the connection lines and fenders satisfy the requirement of rel- evant guidance notes.