单节扩张抗式消声器声传输特性研究  

RESEARCH ON SOUND TRANSMISSION CHARACTERISTICS OF SINGLE-SECTION EXPANDED ANTI-NOISE MUFFLER

作　　者：尹宗军 苏蓉 黄自成 马学刚 胡汉春 YIN Zong-jun;SU Rong;HUANG Zi-cheng;MA Xue-gang;HU Han-chun(School of Mechanical Engineering,Anhui Institute of Information Technology,Wuhu 241100,China)

机构地区：[1]安徽信息工程学院机械工程学院,安徽芜湖241100

出　　处：《南阳理工学院学报》2024年第2期36-41,共6页Journal of Nanyang Institute of Technology

基　　金：国家自然科学基金项目(62303231);安徽省高校优秀青年科研项目(2022AH030160)。

摘　　要：汽车消声器能降低管道系统内部噪声的传播,对于削弱汽车发动机排气噪声具有优越的效果。利用COMSOL软件建立单节扩张抗式消声器的三维模型,经过验证网格无关性,消除了网格参数对消声器传递损失的影响,运用控制变量原理分别对进出口位置偏移、长度比以及扩张比的参数进行赋值,得到不同的声压以及传递损失云图。研究表明:进出口管位置偏移在频率为0~1800 Hz时的消声能力一致,但当频率为中频1000~3000 Hz时,消声器进出口管位置偏移越大,其消音能力越好;当频率在0~3500 Hz时,随着膨胀腔长度的不断减小,消声器的传递损失曲线向着高频率移动,而传递损失的峰值没有明显变化。The automobile muffler can reduce the transmission of internal noise in the pipeline system,and has an excellent effect on reducing the exhaust noise of automotive engines.The three-dimensional model of a single section expansion resistant muffler was established by using COMSOL software.The grid independence was verified to eliminate the influence of grid parameters on the transmission loss of the muffler.The principle of Control variates was used to assign parameters to the inlet and outlet position offset,length ratio,and expansion ratio,and different sound pressure and transmission loss nephograms were obtained.Research has shown that the noise reduction ability is consistent when the position deviation of the inlet and outlet pipes is found at frequencies ranging from 0~1800 Hz.However,when the frequency is between 1000~3000 Hz,the greater the position deviation of the inlet and outlet pipes of the muffler,the better its noise reduction ability;When the frequency is between 0~3500 Hz,as the length of the expansion chamber decreases,the transmission loss curve of the muffler moves towards the higher frequency direction,while the peak value of the transmission loss does not change significantly.

关 键 词：传递损失 抗式消声器 声传输特性 

分 类 号：U467.3[机械工程—车辆工程]