NVH Robustness Design of Axle Systems

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1、2003-01-1492NVHRobustnessDesignofAxleSystemsZhaohuiSun,GlenC.Steyer,GlennMeinhardtandMarkRanekAmericanAxle&Manufacturing.Inc.Copyright©2003SAEInternationalABSTRACTTheinfluenceofsystemdynamicsongearnoisecanbeconsideredasatwopartprocess:thesystemThispaperpresen

2、tstheprinciplesofrobustnessdesignparametersthatcontrolsthegearmeshstiffness,ortheofaxlesystemdynamicstoreducevehiclesystemgearmeshforcegeneratedperunitgearmeshmotionrelatedaxlegearwhine.Throughexaminingthephysicsvariation;andtheforcetransmissibilityfromthegea

3、roftheaxlegearnoise,theinfluenceofthesystemmeshtotheaxlehousingandfurthertothebracketdynamicsareidentifiedastwoparts,i.e.,thedynamicsattachments[3].Inthestudiesofautomotivemeshforcegeneratedatthegearmeshingperunitgeartransmissiongeartrains,Steyeretal[3]andDon

4、leyetalmeshmotionvariation;andtheforcetransmissibility[2]pointedoutthatgearshaftinertiasandtorsionalfrommeshtotheaxlehousing,andthenfurthertothecompliancesarethemaincontrollingfactorsforgearbracketattachments.Thenoisesensitivedesignmeshforce,andpropertuningof

5、thoseparameterscouldparametersareidentifiedanddiscussed.Componentyieldsignificantreductionofgearnoise.Thishasbeendesignrequirementsareproposedtominimizethevalidatedexperimentallybymanyresearchers(e.g.,Abesystemresonancesinthetypicalgearmeshfrequencyetal[11]an

6、dHirasakaetal[12]).range.TheuseofFEAmodelsforsystemunderstandingandfurtherdesigntuningisillustrated.Fortheforcetransmissibility,however,literatureonaxlesystemsisveryfew.Steyer[3]studiedtheforceINTRODUCTIONtransmissibilityfortheautomotivetransmissiongeartrains

7、byusingasimplified2DOFmodel.TheresultsVehiclesystemgearnoiserelatedtoaxleshasbeensuggestedthattheforcetransmissibilityhaspass-bandfiltercharacteristics,whosewidthandlocationareidentifiedasasignificantnoiseconcernindrivetrainsystems.Inadditiontotheconsistentef

8、fortinimprovingcontrolledbythedrivingsideanddrivensidegearqualitythroughdesignoptimizationandprocesstranslationalresonances,anddesignofbothsideshaftingwithclosedresonanceswillachieveminim