标准船模拖曳水池自航试验不确定度分析  

Uncertainty analysis of benchmark ship model self-propulsion tests

作　　者：张立 陈建挺[1] 陈伟民[1,2] ZHANG Li;CHEN Jianting;CHEN Weimin(Marine Technology Division,Shanghai Ship and Shipping Research Institute,Shanghai 200135,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]上海船舶运输科学研究所航运技术与安全国家重点实验室,上海200135 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2020年第9期100-106,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：高技术船舶科研项目;中远海运集团科研项目;国家自然科学基金资助项目(51809272)。

摘　　要：参考国际船模拖曳水池会议(ITTC,2017)推荐规程以及国家相关标准,对船模拖曳水池的自航试验进行不确定度分析.首先对船模自航试验流程进行了梳理,确定其不确定度来源;然后根据自航试验原理,提出了不同温度时试验数据换算的方法,对ITTC关于自航试验不确定度分析规程进行补充;其次在试验数据进行温度换算之后,计算了船模自航试验中桨模转速、推力、扭矩和强制力的不确定度,并进一步计算了相关自航因子的不确定度.分析结果表明:当名义温度15℃时,按照95%的置信水平,各自航点的转速的扩展不确定度小于0.4%,推力和扭矩的扩展不确定度均低于1.0%,推力减额的扩展不确定度低于5.5%,伴流分数的扩展不确定度低于1.1%.本试验的船模自航试验不确定度分析的方法和步骤可以作为其他水池试验的参考.With reference to the procedures of International Towing Tank Conference(ITTC,2017)and the national standards,the uncertainty of ship model self-propulsion test was analysed.Firstly,the self-propulsion test process was combed to determine the source of uncertainty.According to the test principle of self-propulsion test,a method of converting test data at different temperatures was put forward,which makes up for the defect of ITTC on the uncertainty analysis rule of self-propulsion test.Secondly,the uncertainties of propeller model speed,thrust and torque in the ship model self-propulsion test were calculated,and the uncertainty of the related self-propulsion factor was further calculated.The results show that at the nominal temperature of 15℃,according to the 95%confidence level,the expansion uncertainty of rotational speed is less than 0.4%,and the expansion uncertainty of thrust and torque is less than 1.0%.The extended uncertainty of reduction factors is less than 5.5%,wake factor 1.1%.At the same time,the steps and methods of uncertainty analysis of ship model self-propulsion test can be used as a reference for other tank tests.

关 键 词：船模 拖曳水池 自航试验 自航因子 模型试验 不确定度 

分 类 号：U661.1[交通运输工程—船舶及航道工程]