大型LNG船舶在风浪流共同作用下的系泊试验研究

Experimental study of mooring under combined action of wind,wave and current for large LNG ships

为满足山东LNG项目接收站码头工程设计和码头使用指南制定依据的需要，进行了LNG船模物理模型试验以测定船舶在风、浪、流联合作用下、不同工况组合条件下船舶运动量最大值、最大缆绳拉力、以及船舶对护舷撞击能量和撞击力，同时试验针对26．6万m^3船型分别在370m和390m两种泊位长度进行了对比论证，并对两种系缆方式（3322和4222）进行了对比试验。结果表明，系泊条件随着泊位长度缩短有改善趋势，运动量平均减少约10％，系缆力减幅约4％-11％，撞击力改变不明显。试验条件下各运动量均能够满足PIANC推荐值，系缆力除波周期在10s和12s时个别组次有超标外均能满足缆绳设计要求，其中系缆方式3322比4222要略好一些。各船型对护舷的撞击力和撞击能量均小于所选护舷的设计标准值，均满足设计要求。

To meet the requirement of wharf design and using-guide for Shandong LNG receiving station project, the physical model of ship mooring was carried out in order to determine the maximal ship motion, lines force and impact force under the combined action of wind, wave, current and different loadage and water levels. Two berth lengths for 266,000 m3 LNG （370 m and 390 m） and two mooring line arrangements （4222 and 3322） were compared. The results show that mooring conditions can be improved with the decrease of berth length. The average reduction is about 10% for ship motion and 4%-11% for lines force, but the change of impact force is not obvious. The ship motion and impact force can satisfy the recommendation of PIANC （1995）. The line force over standard （〉50%MBL） occurs under 10 s and 12 s wave periods, and the line arrangement of 3322 is better than 4222. The fender impact force can satisfy the design standard value.