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1、分類號TP113.1學號14030001ＵＤＣ密級公開工學碩士學位論文聲子晶體管路降噪設(shè)計研究碩士生姓名曹曉豐學科專業(yè)機械工程研究方向振動與噪聲控制指導教師郁殿龍研究員國防科學技術(shù)大學研究生院二〇一六年十月DesignofNoiseReductioninPhononicCrystalPipeCandidate：CaoXiaofengAdvisor：Prof.YuDianlongAdissertationSubmittedinpartialfulfillmentoftherequirementsforthedegreeofMasterofEngineeringinMechanic
2、alEngineeringGraduateSchoolofNationalUniversityofDefenseTechnologyChangsha，Hunan，P.R.ChinaOctober，2016國防科學技術(shù)大學研究生院碩士學位論文目錄摘要...........................................................................................................iABSTRACT....................................................
3、..............................................ii第一章緒論..............................................................................................21.1研究背景及意義..............................................................................................21.2傳統(tǒng)管路降噪研究綜述..........................
4、........................................................21.2.1管路聲學.................................................................................................31.2.2空氣管路降噪現(xiàn)狀.................................................................................41.2.3存在的問題.......................
5、......................................................................61.3聲子晶體管路降噪研究基礎(chǔ)..........................................................................61.3.1聲子晶體基本概念和特征.....................................................................61.3.2聲子晶體帶隙機理................................
6、.................................................71.3.3聲子晶體管路降噪基本原理.................................................................81.3.4聲子晶體管路研究現(xiàn)狀.......................................................................101.3.5存在的問題.............................................................
7、..............................101.4管路系統(tǒng)聲傳播特性主要計算方法............................................................101.4.1傳遞矩陣法...........................................................................................101.4.2有限元法........................
