Optimization of Noise Reduction Performance for the Muffler in a Heavy Vehicle

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Chen, Yinghang^1 ; Xu, Donger^1

School of Mechanical and Vehicle Engineering, Bengbu University, Bengbu, Anhui

233000, China^1

关键词: Acoustic performance;    Boundary values;    Design and optimization;    Expansion chamber;    High performance composites;    Hole diameter;    Structural parameter;    Transmission loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/3/032022/pdf
DOI  :  10.1088/1757-899X/439/3/032022

来源: IOP

【 摘 要 】

The noise reduction performance of the muffler is further optimized in order to study the acoustic performance of the high-performance composite muffler. On the basis of reasonable assumptions, the boundary values of the entrance and exit, which of the inner wall surface of the muffler are set up. The internal acoustic finite element model is established through HYPERMESH, and the transmission loss(TL) is calculated by the SYSNOISE module in Virtual. lab. Then, the effect on noise reduction performance by the main structural parameters of muffler, such as the hole diameter of the perforating tube, the number of expansion chamber, and the position of the main air flow passage are discussed. The experiment proves that the noise reduction performance of the muffler is improved effectively, proves the practicability of this method, and also gives a solution for the design and optimization of complex muffler.