噪声与振动控制2025，Vol.45Issue(2)：250-256,272,8.DOI:10.3969/j.issn.1006-1355.2025.02.039
回流扩张室参数对多腔消声器传递损失的影响与优化
Influence of Flow-reversing Expansion Chambers Parameters on Transmission Loss of Multi-chamber Mufflers and Their Optimization
摘要
Abstract
To investigate the influence of structural parameters of the reflux expansion chamber on the acoustic charac-teristics of a multi-chamber muffler,LMS.Virtual Lab software was used for simulation of the muffler model,and the accura-cy of the simulation results was validated through experiments.By using baffles to divide the reflux expansion chamber into three chambers,the effect of structural parameters on the acoustic characteristics of the muffler was analyzed.The results show that increasing the height of expansion chamber Ⅱ can reduce the low-frequency transmission loss,increase the narrow-band and mid-high-frequency transmission loss,and widen the narrow-band range by 30 Hz for every 3 mm increase in height.Increasing the diameter of the connecting through-hole between chambers can shift the transmission loss curve to-wards high frequency side but reduce the noise reduction capability.The variation of the position of the baffle between the in-let and outlet of the muffler has a small impact on the frequency range,but the peak value variation of the transmission loss depends on the effect of the structure of each chamber in the reflux expansion chamber on the noise reduction characteristics.Increasing the length of the insert tube by 5 mm shortens the wide-frequency range by about 40 Hz.An optimal combination of parameters was obtained through orthogonal experiments.A comparison of the transmission loss of the muffler with the original one shows that the average transmission loss in the frequency range of 500-3000 Hz increases by 1.99 times.关键词
声学/消声器/传递损失/正交优化Key words
acoustics/muffler/transmission loss/orthogonal optimization分类
通用工业技术引用本文复制引用
陈洪月,戴忠桓,刘先阳,蔡明航..回流扩张室参数对多腔消声器传递损失的影响与优化[J].噪声与振动控制,2025,45(2):250-256,272,8.基金项目
国家自然科学基金资助项目(52174115) （52174115）
