武汉理工大学学报（交通科学与工程版）
武漢理工大學學報（交通科學與工程版）
무한리공대학학보（교통과학여공정판）
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY(TRANSPORTATION SCIENCE & ENGINEERING)
2015年
4期
778-783
,共6页
穿孔管消声器%多腔室%传递损失%有限元法
穿孔管消聲器%多腔室%傳遞損失%有限元法
천공관소성기%다강실%전체손실%유한원법
perforated muffler%multiple chambers%transmission loss%finite element method
采用一维解析法和三维有限元法分别预测了穿孔管消声器的声学性能，并与实验值对比，结果表明，三维有限元法能在全频段很好地预报消声器的传递损失。采用有限元法研究了多腔室穿孔管消声器的腔室顺序、腔室数目、腔室划分和腔室间距等因素对其声学性能的影响，结果表明：多腔室穿孔管消声器的传递损失值是组成它的多个单腔室穿孔管消声器传递损失的线性叠加，腔室顺序对传递损失结果没有影响；采用插入障板的方式将单腔室穿孔管消声器划分为多腔室穿孔管消声器，可以有效改善消声器的低中频消声性能；插入障板的位置对阻性和抗性消声器的影响规律不同，障板均等划分对阻性消声器的传递损失增大有利，对抗性消声器则并不一定；腔室间距对传递损失的影响主要体现在峰值数目上，峰值大小基本不变，总体而言，腔室间距为0时，消声器在全频段具有最好的消声性能。
採用一維解析法和三維有限元法分彆預測瞭穿孔管消聲器的聲學性能，併與實驗值對比，結果錶明，三維有限元法能在全頻段很好地預報消聲器的傳遞損失。採用有限元法研究瞭多腔室穿孔管消聲器的腔室順序、腔室數目、腔室劃分和腔室間距等因素對其聲學性能的影響，結果錶明：多腔室穿孔管消聲器的傳遞損失值是組成它的多箇單腔室穿孔管消聲器傳遞損失的線性疊加，腔室順序對傳遞損失結果沒有影響；採用插入障闆的方式將單腔室穿孔管消聲器劃分為多腔室穿孔管消聲器，可以有效改善消聲器的低中頻消聲性能；插入障闆的位置對阻性和抗性消聲器的影響規律不同，障闆均等劃分對阻性消聲器的傳遞損失增大有利，對抗性消聲器則併不一定；腔室間距對傳遞損失的影響主要體現在峰值數目上，峰值大小基本不變，總體而言，腔室間距為0時，消聲器在全頻段具有最好的消聲性能。
채용일유해석법화삼유유한원법분별예측료천공관소성기적성학성능，병여실험치대비，결과표명，삼유유한원법능재전빈단흔호지예보소성기적전체손실。채용유한원법연구료다강실천공관소성기적강실순서、강실수목、강실화분화강실간거등인소대기성학성능적영향，결과표명：다강실천공관소성기적전체손실치시조성타적다개단강실천공관소성기전체손실적선성첩가，강실순서대전체손실결과몰유영향；채용삽입장판적방식장단강실천공관소성기화분위다강실천공관소성기，가이유효개선소성기적저중빈소성성능；삽입장판적위치대조성화항성소성기적영향규률불동，장판균등화분대조성소성기적전체손실증대유리，대항성소성기칙병불일정；강실간거대전체손실적영향주요체현재봉치수목상，봉치대소기본불변，총체이언，강실간거위0시，소성기재전빈단구유최호적소성성능。
One‐dimensional analytical method and three‐dimensional finite element method were adopted to predict the acoustic attenuation performance of perforated mufflers .Comparisons with experimental results demonstrated that three‐dimensional finite element method can predict the transmission loss accurately in the whole frequency band .The finite element method was then used to investigate the effects of chamber sequence ,chamber number ,chamber division and chamber distance on the acoustic performance of multi‐chamber perforated mufflers .The results show that the transmission loss of a multi‐chamber perforated muffler is the sum of all component single‐chamber mufflers’ transmission loss .The chamber sequence has no impact on the transmission loss .It can greatly improve the acous‐tic attenuation performance to turn a one‐chamber muffler into a multi‐chamber muffler by inserting rigid baffles in the chamber .T he location of baffles has definitely different effects on dissipative and reactive mufflers .Making one chamber into two equal chambers is good for dissipative mufflers on in‐creasing the transmission loss ,which is not true for reactive mufflers .The distance between two chambers has influence on the number of peaks of transmission loss curves ,and no influence on the peak values .In general ,w hen the distance is zero ,the muffler has the best acoustic performance .
