汽車排氣消聲裝置的結(jié)構(gòu)與消聲性能分析
發(fā)布時間:2018-06-12 06:20
本文選題:消聲裝置 + 汽車工業(yè) ; 參考:《機械設(shè)計與制造》2016年04期
【摘要】:為了實現(xiàn)對汽車工業(yè)中排氣消聲裝置的消聲性能分析,以常用共振式消聲器為原型,通過建立聲學(xué)理論模型進行聲學(xué)分析,確定出這一類型消聲器的聲學(xué)邊界條件,并通過應(yīng)用大型通用多物理場耦合軟件COMSOL進行參數(shù)化建模,在排氣噪聲頻率段內(nèi)進行求解得到消聲器的消聲性能。通過對圓形截面、矩形截面、帶倒角截面共振消聲器進行分析,得出圓形截面共振消聲器的消聲性能明顯優(yōu)于其余兩種結(jié)構(gòu)的消聲性能,導(dǎo)角半徑對消聲性能的影響無明顯規(guī)律性,但總體消聲性能優(yōu)于無倒角截面,最后通過分析共振腔軸向尺寸,得出軸向長度差異對消聲量也有影響。
[Abstract]:In order to analyze the noise performance of exhaust silencers in automobile industry, the acoustic boundary conditions of this type of mufflers are determined by establishing an acoustic theoretical model and taking the common resonant muffler as the prototype. The noise attenuation performance of the muffler is obtained by using the general multi-physical field coupling software COMSOL to model the parameters in the frequency range of exhaust noise. Through the analysis of circular section, rectangular section and resonant muffler with chamfer section, it is concluded that the muffler with circular section is obviously superior to the other two kinds of structures. The influence of the angle radius on the noise attenuation is not obvious, but the overall noise attenuation is better than that without chamfer. Finally, by analyzing the axial dimension of the resonator, it is concluded that the difference of the axial length has an effect on the noise attenuation.
【作者單位】: 西南科技大學(xué)制造科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金資助(51375410) 四川省省部共建教育部重點實驗室資助課題(13zxzk06)
【分類號】:U464.134.4
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1 唐永琪,陳朝陽,胡立臣;汽車消聲器性能計算中的氣流與溫度因素[J];合肥工業(yè)大學(xué)學(xué)報(自然科學(xué)版);2000年03期
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