微穿孔板吸声体的优化设计与仿真研究

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1、AbstractMicro．perforatedpanelabsorberisaresonantsoundabsorbingstructurewhichiscomposedofaperforatedpanelwithlessthan1mmindiameterandtherearcavityofthepanel．Itisrecoverable，re．use，non．combustible，sturdyandlightweightcomparedwiththetraditionalporoussound．absorbingmateriala

2、ndordinaryperforatedpanelabsorber．Inaddition，Micro-perforatedpanelabsorbercangetagoodacousticperformancewithoutadditionalfiberandotherporoussound。absorbingmaterial．Asaresult，ithasbeensuccessfullyappliedinmanyfieldssuchasthebuildingsinside，themuffler，shipsandetc．Itisaccep

3、tedthatmicro’perforatedpanelabsorberisanewgenerationandthemostattractivesound—absorbingmaterial．TheabsorptionpropertiesofMicro-perforatedpanelabsorberdependmainlyonitsstructureparameters．Asaresult，reasonableparameterscanobtainbettersoundabsorption．Butitisunrealistictosea

4、rchfortheoptimumparametersthroughtheexhaustivesearch．Classicalmodelofmicro．perforatedpanelassumesthatthepanelisrigid．Asaresult，theeffectofpropertiesofthepanelisignored．Buttheprecisionofthemodelwilldecreaseifthiseffectmustnotbeignored．Inthispaper,manyadvantagesandinadequa

5、ciesoftheclassicmicro。perforatedpanelabsorberisanalyzed．Theauthorpaysmuchmoreattentiontotheoptimaldesignofstructuralparametersofthemicro—perforatedpanelabsorberandcomputersimulation．Inthispaper,thefollowingaspectshavebeendoneinmywork·Firstly’soundabsorptionperformanceofm

6、icro—perforatedpanelabsorberisdeterminedbyanumberofstructuralparameters．EffectofsoundabsorptioncharacteristicsofparametersontheMicro．perforatedpanelabsorberisanalyzeddeeplythroughtheMATLABsimulation．Andasimulationdesignsystemofmicro-perforatedpanelabsorberisdevelopedbase

7、donMATLABandLABVIEWcode，whichcandesignthemicro-perforatedpanelabsorberstructureaccordingtotherequirementsofthespecificengineerapplicationbackgroundconvenientlyintwoways．Secondly,theAdaptivenichegeneticalgorithmisusedinoptimizingmonolayeranddoublelayermicro．perforatedpane

8、labsorberinthispaper．Widerbandandhigherabsorptioncometruebysearchingfortheoptimalcombinationofparameter