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多腔共振式消聲器的聲學(xué)特性分析
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    摘要:

    多腔赫姆霍茲共振消聲器的內(nèi)部結(jié)構(gòu)比較復(fù)雜,，一維平面波理論無法準(zhǔn)確預(yù)測(cè)其聲學(xué)性能，利用三維聲學(xué)軟件分別對(duì)不同組合形式的多腔赫姆霍茲共振消聲器進(jìn)行數(shù)值仿真,，分析不同組合結(jié)構(gòu)對(duì)共振消聲器傳遞損失的影響,。結(jié)果表明：并聯(lián)或串聯(lián)形式共振消聲器，可以消除多個(gè)頻率處噪聲值,，或增加某個(gè)頻率處的消聲量,，串并聯(lián)組合結(jié)構(gòu)有效地?cái)U(kuò)展共振消聲器的消聲頻帶，提高消聲性能,。

    Abstract:

    Since the inner structure of multi-chamber Helmholtz resonator is complicated, acoustical performance could not be predicted by 1-D plane wave theory. The 3-D acoustical software has been used to simulate multi-chamber Helmholtz resonator which was combined in different ways. Then the influence of different combined structures on transmission loss of Helmholtz resonator was analyzed. The results showed that the parallel or serial structure of Helmholtz resonator could eliminate noise of several frequencies or increase transmission loss in one frequency. The combined series-parallel structure could increase its working frequency range and transmission loss. 

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畢嶸,劉正士,王慧,吳昊,劉煥進(jìn).多腔共振式消聲器的聲學(xué)特性分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(10):48-51.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(10):48-51.

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