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1、VehiclenoisevibrationandharshnessAbstractVehiclenoise,vibrationandharshness(NVH)isusuallythemajorattributebecauseofitspriorityinthedesignofvehicles.NVHaffectsthedesignandmanufactureprocessofavehicleashighercustomersatisfactionareattributedbyagoodNVHbehavior.TheresearchonNVHreliesonavarietyofcompute
2、rsoftwaretoimproveandcontrolNVH.Inthispaper,severalvehiclecomponentsincludingrubberdampersandisolatorswhichplayanimportantrole泊controllingtheNVHarepresented.AdescriptionofsourceofNVHinavehicleisshown.Keywords:NVH;rubberdamper;isolator;research.1.IntroductionVehiclesconsistofspacevehicles,airplanes,
3、submarines,trains,road,off-roadandothers[1].Vehiclenoise,vibration,andharshness(NVH)isamajorproblemintheautomobilemanufacturingprocessandaffectsthecustomersatisfactionofautomobileowners.Theresearchesofvehiclenoise,vibration,andharshness(NVH)arenotonlysuitableforthedesignprocessofnewautomobiles,butc
4、ontributetoimprovethecomfortandperformanceofcurrenttypeofautomobiles.Thoseresearchesarelargelyduetotheincreasingdemandsofvehiclemanufacturers,OriginalEquipmentManufacturers(OEMs)andcustomers・TheOEMsaimtolookfortheproductsthataddressissuesofNVH,reducevehicleweight,improvestiffness,andareeasytomodel,
5、lowercosts,andareenvironmentallyfriendly[2].Automotivenoise,vibrationandharshnessarethemostimportantissueswhenthecustomersassessvehiclequality[1].Ontheotherhand,somemanufacturersrefusetocorporateautomationintovehicledesign,asaddressingtheissuesofNVHwhichmakesvehiclestooquietmayposeathreattothesafet
6、yofpedestrians[4].Thevehicularnoisecanactasawarningsignalforpedestrians.SomecomponentsinthevehiclesplayimportantrolesinreducingNVH,namelyrubberdampers,thepowerplants,chassiscoupling,andelastomericisolators.Rubberdampersinsertbetweenthefinsandrubberdampersreducetheamplitudeofvibrationoffinswhichareu
7、sedtospeeduptheheattransferfromtheenginesurfaces[3].Invehicles,theenginemountsaffectlargelythenoise,vibration,andharshnesscomfort.Themountsareusedtoprovidesupportsforthepowerplantandtoisolatethevibrationsof
