中国舰船研究2016，Vol.11Issue(4)：79-86,8.DOI:10.3969/j.issn.1673-3185.2016.04.012
基于有限元能量流的混合结构间耦合损耗因子
The coupling loss factor of mixed structures based on the finite element energy flow model
摘要
Abstract
The aluminum-steel structure is often applied to high speed vessels for the purpose of weight reduction, declining center of gravity, and high speed. The transition joint between the steel-made main hull and aluminum alloy superstructure could affect the propagation of structure acoustic waves, thus affect?ing the Coupling Loss Factor (CLF) between these structures, a key parameter of Statistical Energy Analysis (SEA) and significantly impacts the prediction of noise. Based on the finite element energy flow method, a numerical computation model and corresponding calculation program in Matlab are developed, which are then verified with experiment and L model's wave approach results. The influence of calculation parameters on accuracy is studied and relevant suggestions are given. Particularly, the effect of joint parameters on CLF is studied, suggesting that the thickness ratio of plate and joint has a large impact to the CLF;the ener?gy flow features of the stiffened plate model is studied, indicating that compared with the flat model, the CLF curve of the stiffened plate model is more mild. Overall, the proposed program and the findings in this paper provide guidance for noise prediction and reduction in marine engineering.关键词
耦合损耗因子/有限元能量流法/统计能量分析法/钢、铝混合接头Key words
Coupling Loss Factor(CLF)/finite element energy flow method/Statistical Energy Analysis (SEA)/steel-aluminum transition junction分类
交通工程引用本文复制引用
陈景昊,吴卫国,林永水..基于有限元能量流的混合结构间耦合损耗因子[J].中国舰船研究,2016,11(4):79-86,8.基金项目
工业和信息化部高技术船舶专项资助项目(工信部联装[2010]337号) （工信部联装[2010]337号）
中央高校基本科研业务费专项资金资助项目(2014-zyo-22) （2014-zyo-22）
