波纹消声器声学性能的数值分析及试验  

Numerical analysis and experiments of the acoustic performance of a corrugated muffler

作　　者：吴太英 温华兵 潘飞 郭俊华 申华 WU Taiying;WEN Huabing;PAN Fei;GUO Junhua;SHEN Hua(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Chongqing Jiangjin Shipbuilding Industry Co.,Ltd.,Chongqing 402263,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212100 [2]重庆江增船舶重工有限公司,重庆402263

出　　处：《振动与冲击》2024年第20期275-281,共7页Journal of Vibration and Shock

基　　金：高技术船舶科研项目(2145152301)。

摘　　要：波纹消声器可实现特定频带上的消声最大化,通过调节不同波纹深度的重新组合获取非规则波纹结构来实现频带上的互补。采用侧支共振腔理论公式计算单波纹传递损失,依据双负载原理搭建试验台测量波纹管声学性能,将理论、试验结果分别与数值预测值进行比较。研究结果表明:波纹深度是影响单波纹共振频率的主要因素;非规则波纹结构传递损失带宽主要受非规则波纹数量、相邻波纹深度差影响;消声腔容积影响有效带宽频率范围。最终优化结果相比常规波纹管,在1000~5000 Hz内传递损失均值提升约20.55 dB,带宽拓宽约1750 Hz。A corrugated muffler can maximize the muffling in specific frequency bands,and the frequency bands are complemented by adjusting the recombination of different corrugation depths to obtain irregular corrugated structures.The transmission loss of single bellows was calculated by using the theoretical formula of side-branch resonance cavity,and the acoustic performance of bellows was measured by constructing an experimental bench based on the double-loading principle,theoretical and experimental results were compared with numerical predictions.The results show that the corrugation depth is the main factor affecting the resonance frequency of single corrugated structures.Irregular corrugated structure transferring loss bandwidth is mainly affected by the number of irregular corrugations,the depth difference of adjacent corrugations.The volume of the anechoic chamber affects the effective bandwidth frequency range.The final optimized result improves the mean value of transmission loss by about 20.55 dB in 1000-5000 Hz and broadens the bandwidth by about 1750 Hz compared to the conventional bellows.

关 键 词：波纹消声器 非规则波纹 双负载法 传递损失 带宽 

分 类 号：TB535.2[理学—物理]