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1、重庆大学硕士学位论文II英文摘要ABSTRACTWithdevelopmentofChineseeconomy,carownershiphasincreaseddramaticallyinourcountry,thenthenoisepollutionisbecomingincreasinglyserious,andthemainmethodistoinstallaexhaustmuffler.Inexhaustmufflerdesignwork,typeselectiondesignisalwaysbeused,itisnoteasytomeettherequirements.
2、Thus,thestudyonmufflerdesignandoptimizationhasimportantpracticalsignificance.Thispaperembarksfromthemuffleroptimization,using1-Dtransfermatrixmethod,completedasystemformufflersizeoptimization,andappliedtooptimizeamuffler.Specificworkincludesthefollowingaspects:Thisthesissummarizes18kindsofbas
3、icmufflerunitsandthetransfermatrixisdeduced，includingaperforationresistanceunit.Attenuationcharacteristicsaboutthebasicmufflerunitsarestudiedbyfiniteelementmethod,obtainedtheperformanceofdifferentstructuresizemuffler.BasedonMATLABoptimizationtoolboxfunctionsandtransfermatrixmethod,byusingGUI,
4、amufflersizeoptimizationsystemiscompleted.Thesystemcanbeinthesamestructure,toachievetheoptimaldesignofthemuffler;itisalsoconvenienttosetvariables,constraintsandmodifytheparametersoftheoptimizationfunction.Optimizationforamuffleriscompletedbyusingtheoptimizationsystem,theTLcurvesbeforeandafter
5、optimizationisbasicallyconsistentwiththefiniteelementanalysisresults,thisverifiestheeffectivenessoftheoptimizationsystem.Also,themufflersareanalyzedintheflowfield,obtainedthepressurelosscurvebeforeandaftertheoptimization,thechangeisnotobvious.Keywords：ExhaustMuffler,TransferMatrix,FiniteEleme
6、ntMethod,Optimization,SystemDevelopmentIII重庆大学硕士学位论文IV目录目录中文摘要..........................................................................................................................................I英文摘要........................................................................................
7、...............................................III1绪论...........................................................................................................................................11.1研究背景及意义.......................................
