不同通航模式下LNG泊位组船舶通航效率研究

Assessment on the navigability efficiency of liquefied natural gas ship multi-berths under different navigable organization modes

LNG船舶通航因特殊监管要求,具有一定排他性。前期研究表明基于目前一般通航规则,单个港址LNG泊位数量不宜超过4个,超过后,船舶通航效率较低、运营监管风险较高。本文采用多智能体泊位组联合运营仿真建模,采用控制变量法,定量评估了码头高负荷状态下不同LNG船舶监管条件和航行距离对LNG运输船舶通航效率的影响,以及采用一定优化通航组织方式对通航效率提升的效果。结果表明,LNG泊位数量4个、独立单向航道、LNG船舶航行监管距离在20海里左右时,系统运营效率相对的较高;进一步采取LNG船舶组队进出港或设置独立双向LNG航道通航等缩短必要交通管制所占用航道时间的优化通航组织,对提高LNG船舶通航效率具有明显效果。研究成果可为LNG码头合理建设规模、LNG船舶通航组织优化及航行安全保障等提供参考依据。

Because of the special regulatory requirements,the navigation of LNG ships has certain exclusivity.Early research indicates that based on current general navigation rules,the number of LNG berths in a single port site should not be more than 4.When four or more LNG-berths are operating at the same time,ship navigation efficiency is low and operational supervision risk is high.Based on multi-agent berth group joint operation simulation modeling and the control variable method,the influence of different LNG ship supervising conditions and distance on the ship efficiency of LNG transport ships under high load of terminals is quantitatively evaluated.Furthermore,the effect of implementing certain optimized navigation organization methods to improve efficiency is studied.The results show that,(1)Under condition of 4 berths in a single LNG port and independent one-way channel with 20 nautical miles supervising distance,the system operation efficiency is relatively high;(2)It has a significant effect on improving the efficiency of LNG ship navigation,if some optimized navigation organizations(for example.ships navigation as a team or independent two-way LNG channel navigation)to shorten the occupied time of the channel are implementing.The research results can provide a reference for reasonable location selection of LNG terminals and optimized navigation.