本文選題：微穿孔板 + 吸聲系數(shù)��； 參考：《湖北工業(yè)大學(xué)》2017年碩士論文

【摘要】：吸聲材料吸聲特性值的測(cè)量工作在不同實(shí)驗(yàn)室、不同測(cè)量方法下無(wú)法統(tǒng)一、不具有可比性,導(dǎo)致吸聲材料的質(zhì)量良莠不一。吸聲材料的準(zhǔn)確測(cè)量是評(píng)價(jià)其質(zhì)量的重要保障,為了改善吸聲材料測(cè)量值的準(zhǔn)確可靠性,需建立聲學(xué)標(biāo)準(zhǔn)樣板、標(biāo)準(zhǔn)測(cè)量方法、被測(cè)材料的量值溯源途徑,實(shí)現(xiàn)對(duì)吸聲材料聲學(xué)特性進(jìn)行標(biāo)準(zhǔn)的量化評(píng)價(jià)。論文的主要研究?jī)?nèi)容是制備聲學(xué)標(biāo)準(zhǔn)樣板,對(duì)于聲學(xué)標(biāo)準(zhǔn)樣板的參數(shù)設(shè)計(jì),根據(jù)聲學(xué)標(biāo)準(zhǔn)樣板的設(shè)計(jì)要求,選用結(jié)構(gòu)穩(wěn)定、便于保存、吸聲性能良好的微穿孔板進(jìn)行參數(shù)優(yōu)化設(shè)計(jì),分別采用遺傳算法和粒子群算法優(yōu)化聲學(xué)標(biāo)準(zhǔn)樣板,采用傳遞函數(shù)法測(cè)量聲學(xué)標(biāo)準(zhǔn)樣板的吸聲系數(shù),結(jié)果表明聲學(xué)標(biāo)準(zhǔn)樣板的測(cè)量值能較好地匹配理論模型。首先,基于微穿孔板理論模型進(jìn)行參數(shù)作用分析,微穿孔板的四個(gè)結(jié)構(gòu)參數(shù)共同影響著微穿孔板吸聲體的吸聲性能,理論分析表明為得到高吸收、寬頻帶的聲學(xué)標(biāo)準(zhǔn)樣板,要全面綜合地考慮各個(gè)參數(shù)的作用。其次,采用粒子群算法和遺傳算法對(duì)微穿孔板在低頻段100~1000Hz和高頻段800~5000Hz進(jìn)行優(yōu)化,其優(yōu)化結(jié)果達(dá)到了制備聲學(xué)標(biāo)準(zhǔn)樣板的設(shè)計(jì)要求。兩種算法的優(yōu)化結(jié)果基本保持一致,相互對(duì)比驗(yàn)證了優(yōu)化的正確性,為聲學(xué)標(biāo)準(zhǔn)樣板的制備在參數(shù)設(shè)計(jì)上提供支持。最后,根據(jù)優(yōu)化結(jié)果制備聲學(xué)標(biāo)準(zhǔn)樣板,采用傳遞函數(shù)法測(cè)量其聲學(xué)性能,測(cè)量結(jié)果表明在低頻段和高頻段內(nèi),聲學(xué)標(biāo)準(zhǔn)樣板的聲學(xué)性能均能較好地匹配其理論模型,吸聲材料的聲學(xué)性能可以根據(jù)理論模型進(jìn)行預(yù)測(cè),制備聲學(xué)標(biāo)準(zhǔn)樣板,建立聲學(xué)標(biāo)準(zhǔn)樣板、標(biāo)準(zhǔn)測(cè)量方法、被測(cè)材料完整的量值溯源途徑。
[Abstract]:The measurement of sound absorption characteristics of sound absorbent materials can not be unified and comparable under different measurement methods in different laboratories, which leads to different quality of sound absorbing materials. The accurate measurement of sound absorbing material is an important guarantee to evaluate its quality. In order to improve the accuracy and reliability of sound absorbing material, it is necessary to establish the acoustic standard template, standard measurement method and traceability of the measured material. The acoustic characteristics of acoustical materials are evaluated quantitatively. The main research content of this paper is to prepare the acoustic standard template. For the parameter design of the acoustic standard template, according to the design requirements of the acoustic standard template, the structure is chosen to be stable and easy to preserve. The microperforated plate with good sound absorption performance is optimized for parameter design. Genetic algorithm and particle swarm optimization algorithm are used to optimize the acoustic standard template, and the transfer function method is used to measure the sound absorption coefficient of the acoustic standard template. The results show that the measured values of the acoustic standard template can well match the theoretical model. First of all, based on the theoretical model of microperforated plate, the four structural parameters of microperforated plate affect the sound absorption performance of microperforated plate. The theoretical analysis shows that the acoustic standard template with high absorption and wide band can be obtained. The function of each parameter should be considered comprehensively and synthetically. Secondly, particle swarm optimization (PSO) and genetic algorithm (GA) are used to optimize microperforated plate in low frequency 100~1000Hz and high frequency 800~5000Hz. The optimization results of the two algorithms are basically consistent, and the correctness of the optimization is verified by the comparison between the two algorithms, which provides support for the preparation of the acoustic standard template in parameter design. Finally, the acoustic standard template is prepared according to the optimized results, and its acoustic performance is measured by the transfer function method. The measurement results show that the acoustic performance of the acoustic standard template can match its theoretical model well in the low frequency and high frequency bands. The acoustic properties of acoustical materials can be predicted according to the theoretical model, the acoustic standard templates can be prepared, the acoustic standard templates, the standard measurement methods and the complete traceability of the measured materials can be established.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP18;O42

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