摘要
为保证工程船舶在拖航过程中的安全性,对拖航阻力预报方法进行研究。在分析船舶拖航阻力组成成分的基础上,阐述各阻力成分的计算方法。以某肥大型工程船为例,采用模型试验的方法对其静水阻力性能进行评估,采用经验公式对其在中等海况下的风阻力、波浪阻力和海流阻力进行估算,最终得到其拖航总阻力。试验和计算结果表明:当船舶航速较低时,风阻力在拖航总阻力中占比较大;随着船舶航速的增加,静水阻力逐渐成为拖航总阻力的主要成分;波浪阻力在拖航总阻力中占比较小;海流阻力随着船舶航速的增加逐渐增大。
The towing resistance components are analyzed and their calculation methods are introduced.The calculation for the case of a full formed tug is carried out for illustration.The still water resistance is obtained from model tests.The wind resistance,wave resistance and current resistance under moderate sea conditions are estimated using the empirical formulas.And the total towing resistance is the combination of them.The calculation indicates that 1)most of resistance comes from win when ship speed is lower;2)with the increase of ship speed,calm water resistance becomes the main resistance component;3)wave resistance is not important in all cases;4)the effect of current gradually increases as the ship speed increases.
作者
张立
陈伟民
吕明冬
苑志江
ZHANG Li;CHEN Weimin;LYU Mingdong;YUAN Zhijiang(State Key Laboratory of Navigation and Safety Technology,Shanghai Ship and Shipping Research Institute,Shanghai 200135,China;Key Laboratory of Marine Technology Ministry of Communications,Shanghai Ship and Shipping Research Institute,Shanghai 200135,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;PLA Dalian Naval Academy,Dalian 116013,China)
出处
《上海船舶运输科学研究所学报》
2021年第2期1-4,11,共5页
Journal of Shanghai Ship and Shipping Research Institute
基金
国家自然科学基金(51809272)。
关键词
船舶
拖航
阻力
模型试验
经验公式
ship
towing
resistance
model test
empirical formula
