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1、.VehiclenoisevibrationandharshnessAbstractVehiclenoise,vibrationandharshness(NVH)isusuallythemajorattributebecauseofitspriorityinthedesignofvehicles.NVHaffectsthedesignandmanufactureprocessofavehicleashighercustomersatisfactionareattributedbyagoodNVHbehavior.TheresearchonNVHreliesonava
2、rietyofcomputersoftwaretoimproveandcontrolNVH.Inthispaper,severalvehiclecomponentsincludingrubberdampersandisolatorswhichplayanimportantroleincontrollingtheNVHarepresented.AdescriptionofsourceofNVHinavehicleisshown.Keywords:NVH;rubberdamper;isolator;research.1.IntroductionVehiclesconsi
3、stofspacevehicles,airplanes,submarines,trains,road,off-roadandothers[1].Vehiclenoise,vibration,andharshness(NVH)isamajorproblemintheautomobilemanufacturingprocessandaffectsthecustomersatisfactionofautomobileowners.Theresearchesofvehiclenoise,vibration,andharshness(NVH)arenotonlysuitabl
4、eforthedesignprocessofnewautomobiles,butcontributetoimprovethecomfortandperformanceofcurrenttypeofautomobiles.Thoseresearchesarelargelyduetotheincreasingdemandsofvehiclemanufacturers,OriginalEquipmentManufacturers(OEMs)andcustomers.TheOEMsaimtolookfortheproductsthataddressissuesofNVH,r
5、educevehicleweight,improvestiffness,andareeasytomodel,lowercosts,andareenvironmentallyfriendly[2].Automotivenoise,vibrationandharshnessarethemostimportantissueswhenthecustomersassessvehiclequality[1].Ontheotherhand,somemanufacturersrefusetocorporateautomationintovehicledesign,asaddress
6、ingtheissuesofNVHwhichmakesvehiclestooquietmayposeathreattothesafetyofpedestrians[4].Thevehicularnoisecanactasawarningsignalforpedestrians....SomecomponentsinthevehiclesplayimportantrolesinreducingNVH,namelyrubberdampers,thepowerplants,chassiscoupling,andelastomericisolators.Rubberdamp
7、ersinsertbetweenthefinsandrubberdampersreducetheamplitudeofvibrationoffinswhichareusedtospeeduptheheattransferfromtheenginesurfaces[3].Invehicles,theenginemountsaffectlargelythenoise,vibration,andharshnesscomfort.Themountsareusedtoprovidesupportsforthepowerplantandtoisolatethevibrati
