基于声学超材料的发动机排气消声器优化设计  

Optimization Design of Engine Exhaust Muffler based an Acoustic Metamaterials

作　　者：张佳琪 陈永辉[1] 燕群[1] 郭增彩 Zhang Jiaqi;Chen Yonghui;Yan Qun;Guo Zengcai(National Key Laboratory of Strength and Structural Integrity.Aircraft Strength Research Institute of China,Xi'an,Shaanxi,710065.China)

机构地区：[1]中国飞机强度研究所强度与结构完整性全国重点实验室,陕西西安710065

出　　处：《飞行器强度研究》2024年第4期69-74,共6页Aircraft Strength Research

摘　　要：某活塞式发动机存在严重的宽频噪声问题,通过试验分析得出排气噪声是其主要噪声源。本文针对该型发动机排气噪声通过频谱分析出其主要消声频带为315Hz~4000Hz,结合消声器设计基本理论与方法,设计出排气消声器的基本结构。通过仿真计算分析,消声器低频段消声性能不足,故引人声学超材料结构进行优化,与优化前的消声器对比,低频段消声效果得到了明显的提高。A certain piston engine has severe broadband noise,and through experimental analysis.it is found that exhaust noise is the main cause.This article analyzes the frequency spectrum of engine exhaust noise and identifies the main noise reduction frequency band as 315Hz-4000Hz.Based on the basic theory and methods of muffler design,the basic structure of the exhaust muffler is designed.To address the issue of insufficient noise reduction performance in the low-frequency range of the muffler,an acoustic metamaterial structure is introduced for optimization.Compared with the muffler before op-timization,themufflereffect in low frequency band has been significantly improved.

关 键 词：排气消声器 声学超材料 结构优化 

分 类 号：TB5[理学—物理]