Similarity Criterion and Scale Effect for Ship Distortion Model Under Combined Loads  

复合载荷作用下船舶畸变模型相似准则及尺度效应研究

作　　者：ZHANG Yi-long WEI Peng-yu DAI Ze-yu WANG Lian ZENG Qing-bo TANG Qin 张亦龙;韦朋余;戴泽宇;王连;曾庆波;唐沁(中国船舶科学研究中心,江苏无锡214082;江南大学外国语学院,江苏无锡214122)

机构地区：[1]China Ship Scientific Research Center,Wuxi 214082,China [2]School of Foreign Studies,Jiangnan University,Wuxi 214122,China

出　　处：《船舶力学》2024年第12期1880-1890,共11页Journal of Ship Mechanics

基　　金：国家重点研发计划资助项目(2022YFB3404800)。

摘　　要：For the ultimate strength model test evaluation of large ship structures, the distortion model with non-uniform ratio between the main size and the plate thickness size is usually adopted. It is the key to carry out scale model test to establish a distortion model similar to the real ship structure under combined load. A similarity criterion for ship distortion model under the combined action of bending moment and surface pressure was proposed, and the scale effect for the criterion was verified by a se ries of numerical analysis and model tests. The results show that the similarity criterion for ship distor tion model under combined loads has a certain scale effect. For the model tests of ship cabin struc tures, it is suggested that the scale range between the plate thickness scale and the main dimension scale should be controlled within 2:1, which can be used as a reference for distortion model design and ultimate strength test of large-scale ship structures.对大型船舶结构开展极限强度模型试验评估,通常采用主尺寸与板厚尺寸非等比缩比的畸变模型,如何实现复合载荷作用下畸变模型与实船结构相似是其重要问题之一。本文提出弯矩-表面压力复合作用下船舶畸变模型相似准则,并对准则的尺度效应进行系列数值分析和模型试验验证。研究表明,复合载荷作用下船舶畸变模型相似准则存在一定的尺度效应,对舱段结构开展模型试验时,建议板厚缩尺比与主尺寸缩尺比之间的比例范围控制在2:1以内。研究成果可为大型船舶结构畸变模型设计与极限强度试验提供参考。

关 键 词：distortion model combined load similarity criteria scale effect ultimate strength test 

分 类 号：U663[交通运输工程—船舶及航道工程]