GMN 5801TP-2001 Frame Static Stiffness Master Procedure

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1、NorthAmericanTestProcedureGMN5801TPENGINEERINGSTANDARDS(Book)Title:FrameStaticStiffnessMasterProcedure2.1Normative.N/A1Introduction2.2GM.Note:Nothinginthespecification,however,supersedesapplicablelawsandregulationsGMN5802TPTransducerCalibrationMasterunlessaspecificexemptionhasbeenobt

2、ained.Procedure.1.1Purpose.Toprovideguidelinesforsetting2.3Additional.upandperformingframestaticstiffnesstests.Thisdocumentwillnotprovideanyinformation3Resourcesonspecificstaticstiffnesstests(e.g.frontframetorsional),whichhaveseparateEvaluationTest3.1Facilities.Alargebedplate.Procedu

3、res.3.2Equipment.1.2Foreword.Framestaticstiffnessmetrics3.2.1TestEquipmentareincludedintheChassisSSTSTemplate.Theserequirementsareimportantforimproving3.2.1.1Displacementtransducers(e.g.digitalthenoise&vibrationperformanceoffull-framedialincators)with0.005mmresolution.vehicles.3.2.1.

4、2Forcetransducerswithminimumrange1.3Applicability.FramesfromGMandof3000Nstaticloadand5Nresolution,andcompetitivefull-framevehicles.associatedpowersuppliesandreadouts.1.4Definitions.3.2.2TestFixtures1.4.1BoundaryCondition:constrainingforces3.2.2.1Elephant’sfeet,orsimiilar,tomounttheap

5、pliedtotheframethatpreventframegrossframetothebedplate.motionduringappliedforces.3.2.2.2Spacerplatesforconstrainingtheframe1.4.2AppliedForces:Staticloadsthatarethroughbodymountbrackets.inducedontotheframeatspecificlocations3.2.2.3Forenginemountandtransmission(e.g.frontshockattachment

6、s).mountbracketframestiffnesstests,modified1.4.3TorsionalStaticStiffness:theslopeofthemountswiththerubberremoved.momentversusangulardeflectioncurveforthe3.2.2.4Wedgeblocksforprovidinglevelframewhenitissubjecttoagivenstaticsurfacesatdialindicatortips.momentloadcasewhileconstrainedbysp

7、ecifiedboundaryconditions.3.2.2.5SphericalBearings(‘‘Heim“Joints).1.4.4StaticStiffness:theslopeoftheforce3.2.2.6ThreadedRod/Washers/Nuts.versusdeflectioncurvefortheframewhenitis3.2.2.7Forfront/rearframetorsionaltests,ansubjectedtoagivenstaticloadcasewhilealuminumreferencebartobehot-g

8、luedacrossco