LNG船舶系泊试验对比分析研究
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摘要
以目前国内设计可接卸26.6万m~3LNG船舶中泊位最短的某液化天然气(LNG)码头工程为例,针对码头长度仅370 m时,26.6万m~3LNG船在不同风浪流组合作用下的船舶运动量、系缆力和撞击力进行了研究,以达到LNG船舶安全系泊的要求。主要通过不规则波及规则波作用、物理模型和数学模型、船艏艉对调试验对比等进行了多手段研究,研究结果表明:不规则波作用船舶运动量、系缆力和撞击力普遍大于规则波;物理模型试验中,45°斜浪的作用对船舶运动量、系缆力和撞击力的影响最大,30°斜浪次之;船舶艏艉对调停靠时船舶运动量与未对调前的运动量、系缆力和撞击力相差不大,艏、艉缆受力位置分布有所改变。
In order to improve the motion performance of moored LNG vessels, balance the mooring line tension and reduce the risk of breaking mooring, the research on the mooring line tension and the motion of vessel under various environmental loads which combined with winds, waves and currents were carried out, and the results from irregular and irregular wave, physical model and mathematical model, bow and stern alignment were compared. The results of the test of irregular wave are generally greater than the regular wave. In the physical model test, the effect of oblique waves with 45 degrees angle on the motion, mooring line tension and impact force was the most important, followed by oblique waves with 30 degrees angle. The results were similar whether the bow and stern were reversed or not. The force distribution of bow and stern cable had been changed.
In order to improve the motion performance of moored LNG vessels, balance the mooring line tension and reduce the risk of breaking mooring, the research on the mooring line tension and the motion of vessel under various environmental loads which combined with winds, waves and currents were carried out, and the results from irregular and irregular wave, physical model and mathematical model, bow and stern alignment were compared. The results of the test of irregular wave are generally greater than the regular wave. In the physical model test, the effect of oblique waves with 45 degrees angle on the motion, mooring line tension and impact force was the most important, followed by oblique waves with 30 degrees angle. The results were similar whether the bow and stern were reversed or not. The force distribution of bow and stern cable had been changed.
引文
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[3]时恩哲,裴玉国,罗立群.开敞式码头泊位长度优化试验研究[J].应用基础与工程科学学报,2011,19(6):894-899.SHI E Z,PEI Y G,LUO L Q.Experimental optimization study on berth length of open sea terminal [J].Journal of basic science and engineering,2011,19(6):894-899.
[4]Nguyen Dat H,Nguyen Dong T.Control of marine riser end angles by position mooring [J].Control Engineering Practice,2010,18:1 013-1 021.
[5]李焱,王智勇,郑宝友.大型开敞式原油码头船舶作业和系泊安全条件试验研究[J].水道港口,2015,36(3):185-190.LI Y,WANG Z Y,ZHENG B Y.Model test on ship operating and mooring safety condition of large-scale open crude oil terminal [J].Journal of Waterway and Harbor,2015,36(3):185-190.
[6]高峰,沈文君,李焱,等.船舶系泊动力分析数值模拟计算研究[J].水道港口,2015,36(6):494-501.GAO F,SHEN W J,LI Y,et al.Study on numerical simulation of ship mooring by dynamic analysis[J].Journal of Waterway and Harbor,2015,36(6):494-501.