摩擦噪声与降噪技术研究

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1、机械科学研究院硕士学位论文摩擦噪声与降噪技术研究姓名：周燕申请学位级别：硕士专业：机械设计及理论指导教师：李健20060701摘要机械科学研究院硕士学位论文ABSTRACTNoiseiSthethirdresourceofpollutionwhichdoharmtotheindustrycivilizationbesidesthepollutionofairandwater．Withthedevelopmentofscientifictechnologyandtheadvancementofthefast

2、enedsocietystep，theradiatedfriction-inducednoisebringsaboutharmandlosswhilemechanicalprocess，fastdevelopmentoftransportationbringsconveniencetothesociety．Thereforethenoisecontrolandstudyisnotonlyfortheenvironmentprotectionrequirementbutalsotheproblemtobes

3、olvedforindustryproductsqualityimprovementandlossreduction．Inthestudy,thevarietyruleofthefriction-inducednoisewasstudiedbymeansofthefriction-inducednoisetesting．Fortheconvenienceofmaterialselectioninthelaboratory,thematerialnoise—reducingpropertytestingeq

4、uipmentWaSdesigned．Thesoundinsulationcharacteristicsofpolyurethanerigidfoamsonthebasisofthfferentkindsofpolyetherweretested．Andtheapproachtoimprovethesoundinsulationpropertyofthepolyurethanerigidfoamswasdiscussed．Maininnovationandstudyachievementsaledescr

5、ibedasfollows：(1)AsetoffrictionnoisetestingsystemWaSsetuponthepin-ontester．IntheprocessoffrictiontestinginwhichtheTRIPsteelwithtransformationcharacteristicsiscontinuouslyslidinginunilateralism，varietyruleofthefrictionnoiseintensityWaSstudied．Therelationsh

6、ipbetweenfrictionnoisevarietyandtestingparameterWaSanalyzedbymeansofalteringtheinfluencefactorssuchastherelativeslidingrate，loadandlubricantconditionsintheprocessoftesting．Withthefrictionnoisefrequencycharacteristicscombined，thefrictionnoisemechanicswasst

7、udiedfromtheviewoftribology．(2)Anoise·reducingpropertyofmaterialtestingequipmentwhichsmall，convenient，properframedwithdatacollectionautomationWasdesigned,facilitatingmaterialselectionandtestinginthelaboratory．(3)Adoptingtheself-designedequipment，thesoundp

8、roofnoise—reducingpropertyofpolyurethanerigidfoamsonthebasisofdifferentkindsofpolyetherandthicknessWastested．Fromthetestingresult，asetofdirectionforthebestnoisereductioneffectandthebestthickIlCSSinthedirectionWaSfou