The Shock Absorber Handbook (Wiley-Professional Engineering Publishing Series) - 2nd edition

445 Pages·2007·16.17 MB·English

by  John Dixon

The Shock Absorber Handbook
Second Edition
John C. Dixon, Ph.D, F.I.Mech.E., F.R.Ae.S.
Senior Lecturer in Engineering Mechanics
The Open University, Great Britain
ThisWorkisaco-publication betweenProfessional EngineeringPublishingLtd
andJohnWileyandSons,Ltd.

The Shock Absorber Handbook
Second Edition
Wiley-Professional Engineering Publishing Series
This series of books from John Wiley Ltd and Professional Engineering Publishing Ltd aims to
promotescientificandtechnicaltextsofexceptionalacademicqualitythathaveaparticularappealto
theprofessionalengineer.
Forthcomingtitles:
Vehicle ParticulateEmissions
Peter Eastwood
SuspensionAnalysisandComputationalGeometry
John C.Dixon
ManagingReliabilityGrowthinEngineeringDesign:Decisions,DataandModelling
LesleyWallsandJohnQuigley
The Shock Absorber Handbook
Second Edition
John C. Dixon, Ph.D, F.I.Mech.E., F.R.Ae.S.
Senior Lecturer in Engineering Mechanics
The Open University, Great Britain
ThisWorkisaco-publication betweenProfessional EngineeringPublishingLtd
andJohnWileyandSons,Ltd.
ThisWorkisaco-publicationbetweenProfessionalEngineeringPublishingLtdandJohnWileyandSons,Ltd.
PreviouslypublishedasTheShockAbsorberHandbook,1stEdition,byTheSocietyofAutomotiveEngineers,Inc,
1999,ISBN0-7680-0050-5.
Bythesameauthor:Tires,SuspensionandHandling(SAE).
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Contents
Preface xiii
Acknowledgements xv
1 Introduction 1
1.1 History 1
1.2 TypesofFriction 15
1.3 DamperConfigurations 17
1.4 Ride-LevellingDampers 33
1.5 Position-DependentDampers 35
1.6 GeneralFormoftheTelescopicDamper 37
1.7 Mountings 42
1.8 OperatingSpeedsandStrokes 47
1.9 Manufacture 53
1.10 LiteratureReview 54
2 VibrationTheory 61
2.1 Introduction 61
2.2 FreeVibrationUndamped(1-dof) 61
2.3 FreeVibrationDamped(1-dof) 63
2.4 ForcedVibrationUndamped(1-dof) 68
2.5 ForcedVibrationDamped(1-dof) 71
2.6 CoulombDamping 74
2.7 QuadraticDamping 77
2.8 SeriesStiffness 79
2.9 FreeVibrationUndamped(2-dof) 85
2.10 FreeVibrationDamped(2-dof) 85
2.11 TheResonantAbsorber 86
2.12 DamperModelsinRideandHandling 87
2.13 EndFrequencies 88
2.14 HeaveandPitchUndamped1-dof 90
2.15 HeaveandPitchDamped1-dof 91
2.16 RollVibrationUndamped 93
viii Contents
2.17 RollVibrationDamped 94
2.18 Heave-and-PitchUndamped2-dof 95
2.19 Heave-and-PitchDamped2-dofSimplified 100
2.20 Heave-and-PitchDamped2-dofFullAnalysis 102
3 RideandHandling 105
3.1 Introduction 105
3.2 ModellingtheRoad 105
3.3 Ride 111
3.4 Time-DomainRideAnalysis 113
3.5 Frequency-DomainRideAnalysis 117
3.6 PassengeronSeat 118
3.7 WheelHop 119
3.8 Handling 120
3.9 AxleVibrations 122
3.10 SteeringVibrations 124
3.11 TheRide–HandlingCompromise 124
3.12 DamperOptimisation 129
3.13 DamperAsymmetry 131
4 Installation 135
4.1 Introduction 135
4.2 MotionRatio 135
4.3 DisplacementMethod 137
4.4 VelocityDiagrams 138
4.5 ComputerEvaluation 138
4.6 MechanicalDisplacement 138
4.7 EffectofMotionRatio 139
4.8 EvaluationofMotionRatio 142
4.9 TheRocker 142
4.10 TheRigidArm 148
4.11 DoubleWishbones 150
4.12 Struts 153
4.13 PushrodsandPullrods 155
4.14 MotorcycleFrontSuspensions 156
4.15 MotorcycleRearSuspensions 160
4.16 SolidAxles 165
4.17 DryScissorDampers 168
5 FluidMechanics 169
5.1 Introduction 169
5.2 PropertiesofFluids 170
5.3 ChemicalProperties 171
5.4 Density 171
5.5 ThermalExpansion 172