噪声与振动控制2016，Vol.36Issue(3)：66-69,75,5.DOI:10.3969/j.issn.1006-1335.2016.03.014
含阻振质量基座的舱室声振特性FE-SEA法分析
Analysis of the Cabin Vibro-acoustic Performance of Blocking Masses Pedestal Structure Based on FE-SEA
倪杰 1温华兵 1仲启东1
作者信息
- 1. 江苏科技大学 振动与噪声研究所，江苏 镇江，212003
- 折叠
摘要
Abstract
The vibration attenuating function of the blocking mass is analyzed based on the wave theory. The closed loop structures of box-shaped and solid blocking masses are designed and introduced to the main engine pedestal according to the principle of impedance mismatching and wave conversion. On the basis of the modal density, the overall ship structure is divided into FE substructure and SEA substructure. The FE-SEA hybrid method is introduced to predict the vibro-acoustic performance of the cabin. Comparing with the experimental data, the validity of the simulation results is verified. Comparing the cabin’s vibro-acoustic performance of the closed loop pedestal structure with box-shaped hollow blocking masses with that of the original pedestal structure, the influence of the blocking masses on the vibration suppression effect of the pedestal structure is analyzed. It is shown that the cabin with hollow blocking masses structure has better performance of vibration isolation and noise reduction than that with the solid blocking masses and the original structure. Especially in middle frequency domain, performance of vibration isolation and noise reduction is better than the performance in low frequency domain.关键词
振动与波/阻振质量/FE-SEA混合法/舱室/中频/减振降噪Key words
vibration and wave/blocking masses/FE-SEA hybrid method/cabin/middle frequency/vibration isolation and noise reduction分类
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倪杰,温华兵,仲启东..含阻振质量基座的舱室声振特性FE-SEA法分析[J].噪声与振动控制,2016,36(3):66-69,75,5.
