Calculation and Analysis of Acoustic Characteristics of Straight-Through Perforated Pipe Muffler Based on Multilayer Sound Absorbing Material

• Published in: 东华大学学报（英文版） Vol. 40; no. 5; pp. 506 - 514
• Main Authors: LIU Rongji, ZHU Congyun, DING Guofang, YUAN Lei
• Format: Journal Article
• Language: English
• Published: 31.10.2023
• Subjects: perforated tube; muffler; finite element method; acoustic characteristics; porous sound absorbing material
• ISSN: 1672-5220
• DOI: 10.19884/j.1672-5220.202209005

TB535.2; Using the multi-physical field simulation software COMSOL,the acoustic characteristics of the multilayer sound absorbing material straight-through perforated pipe muffler are studied by the finite element method.The results show that the finite element calculation of the multilayer sound absorbing material straight-through the perforated pipe muffler agrees well with the experimental measurement results.The reliability of the finite element method for studying the acoustic performance of the straight-through perforated pipe muffler with multilayer sound absorbing materials is shown.Furthermore,the influence of some structural parameters of porous sound absorbing material and micro-perforated plate on the acoustic performance of the multilayer sound absorbing material straight-through perforated pipe muffler is analyzed.The muffler based on multilayer sound absorbing material is different from the traditional muffler.After applying the multilayer sound absorbing material to the straight-through perforated pipe muffler,the transmission loss value greatly increases,which provides new ideas and directions for future research on the muffler.