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1、会计学1汽车底盘零部件汽车底盘零部件第一页，共36页。Structural Analysis Capabilitiesn nNormal Modesn nDynamicn nLinear&Nonlinear Staticn nBucklingn nFatiguen nCrashworthiness第1页/共36页第二页，共36页。Examples:第2页/共36页第三页，共36页。Base 4-Link Lower Control Arm 3,2 kg 56 kN/mm stiffness61 kN bucklingthickness:2,5 mmmaterial:S 355 MC 2,4 k
2、g(low weight)3,2 kg(cost optimized)50 kN/mm stiffness 35 kN buckling第3页/共36页第四页，共36页。Boundary conditions Stiffness/BucklingStress analysisConstrained indof 1-3Constrained indof 2-4Forces and/or Moments第4页/共36页第五页，共36页。Lateral ForceAccelerationBrakingCorner第5页/共36页第六页，共36页。Base 4-Link Trailing Arm/Wh
3、eel Carrier 5,4 kg(low weight)6,2 kg(cost optimized)6,9 kg第6页/共36页第七页，共36页。Boundary conditions StiffnessStress analyseConstrained indof 1-3Constrained indof 2Constrained indof 2Constrained indof 2-3Forces and/or Moments第7页/共36页第八页，共36页。647 MPa579 MPaCornerVertical Force第8页/共36页第九页，共36页。Base 4-Link U
4、pper Control Arm 2,1 kg(low weight)2,7 kg(cost optimized)30 kN/mm stiffness 20 kN buckling 1,94 kg 28 kN/mm stiffness27 kN bucklingthickness:3,0 mm shell2,0 mm bushingmaterial:S 355 MC第9页/共36页第十页，共36页。Boundary conditions Stiffness/BucklingStress analysisConstrained indof 1-3Constrained indof 2-4Forc
5、es and/or Moments第10页/共36页第十一页，共36页。Calculated with linear elastic behavior of the material561 MPaPotholeTwist第11页/共36页第十二页，共36页。Base 4-Link Additional Control Arm 0,28 kg(low weight)0,36 kg(cost optimized)100 kN/mm stiffness 39 kN buckling 0,34 kg 177 kN/mm stiffness38,6 kN bucklingthickness:1,5 mm
6、 material:S 355 MC第12页/共36页第十三页，共36页。Calculated with linear elastic behavior of the material694 MPaPotholeCorner turn第13页/共36页第十四页，共36页。Boundary conditions Stiffness/BucklingStress analysisConstrained indof 1-3Constrained indof 2-4Forces and/or Moments第14页/共36页第十五页，共36页。1,3 kg(low weight)1,7 kg(cost
7、 optimized)25 kN/mm stiffness x 15 kN/mm stiffness yBase 4-Link Bracket 1,23 kg33 kN/mm stiffness x50 kN/mm stiffness ythickness:4,0 mm material:S 355 MC第15页/共36页第十六页，共36页。Boundary conditions Stiffness/BucklingStress analyseConstrained indof 1-6Constrained indof 1-6Forces and/or MomentsConstrained i
8、ndof 1-6Constrained indof 1-6第16页/共36页第十七页，共36页。CornerBraking第17页/共36页第十八页，共36页。Uplevel H-Arm Lower Control Arm 6,8 kg(low weight)9,5 kg(cost optimized)8,74 kg thickness:3 mm upper shell 2,5 mm lower shellmaterial:S 420 MC upper shellS 355 MC lower shell第18页/共36页第十九页，共36页。Boundary conditions Stiffne
9、ssStress analysisConstrained indof 3Constrained indof 3Forces and/or MomentsConstrained indof 2-3Constrained indof 1-3第19页/共36页第二十页，共36页。Longitudinal ForceLateral ForceBraking第20页/共36页第二十一页，共36页。Validation RequirementsFront Suspension Lower Control ArmsFront Suspension Lower Control ArmsMethod for C
10、omputing Static Stiffness(Front Lower Control Arm):Reported at ball joint center at x-and y-directionbetween two connection points第21页/共36页第二十二页，共36页。For All Cradles:Report at all bushing and ball joint centersSteering stiffness shall be computed at the tie-relay ball with a rigid bodyFor Non-Isolat
11、ed Cradles:Steering should be attached rigid to the crossmemberFront crossmember to body interface center points should be pinned to ground allowing rotation about the(X,Y,Z)axis and no translation from these pointsFor Isolated Cradles:Use GM Cradle on Mount Differential Stiffness Method with bushin
12、g rates(x=2KN/mm,y=2KN/mm,z=2KN/mm)Use steering bushing rates (x=10KN/mm,y=10KN/mm,z=1KN/mm).First calculation with an elastic cradle,second with a rigid cradle.Subtract the two displacements and calculate the stiffness.Validation RequirementsFront Suspension CrossmembersFront Suspension Crossmember
13、sMethod for Computing Static Stiffness:DOF(1,2,3)locked第22页/共36页第二十三页，共36页。TOTAL MASS=21.85 Kg.Lateral Tubes 2.6mm DP500 Front Tube 2.25mm DP500 Fr.Control Arm brackets 3mm HR60 Attachments to Body 3.2mm stw22 Upper Crossmember 2.5mm HSLA 360 Lower Crossmember 2.3mm HSLA 360 Engine support Front 2.5
14、mm stw22 Re.Control Arm support 3mm stw22 第23页/共36页第二十四页，共36页。2.FEA Linear Load Cases ResultsREF.132 190 65Units:MpaStanding Car1GVertical Load3.5GLongitudinal Load 2GLateral Load2GAccelerating0.5GBraking1.1GCornering1.2GBraking Turn1.05GFront Tube46.376.8307.217.61.1270.233.264.Lateral Tubes22.064.
15、6385.239.62.2395.246.240.Front Control Arm Bracket24.876.8568.213.96.3694.233.472.Upper Crossmember35.8134.465.334.73.1382.309.396.Lower Crossmember34.9189.530.541.146.493.566.438.Rear Control Arm Bracket11.747.0178.37.941.4255.55.1188.Engine Support Front121.073.1104.178.133.77.1196.80.Engine Suppo
16、rt Rear45.673.1314.297.74.9332.328.162.第24页/共36页第二十五页，共36页。3.FEA Linear Load Cases PlotsLoad Case:1G Standing CarREF.132 190 65第25页/共36页第二十六页，共36页。Load Case:3.5G Vertical Load3.FEA Linear Load Cases PlotsREF.132 190 65第26页/共36页第二十七页，共36页。Load Case:2G Longitudinal Load3.FEA Linear Load Cases PlotsREF
17、.132 190 65第27页/共36页第二十八页，共36页。Load Case:2G Lateral Load3.FEA Linear Load Cases PlotsREF.132 190 65第28页/共36页第二十九页，共36页。Load Case:0.5G Accelerating3.FEA Linear Load Cases PlotsREF.132 190 65第29页/共36页第三十页，共36页。Load Case:1.1G Braking3.FEA Linear Load Cases PlotsREF.132 190 65第30页/共36页第三十一页，共36页。Load Ca
18、se:1.2G Cornering3.FEA Linear Load Cases PlotsREF.132 190 65第31页/共36页第三十二页，共36页。Load Case:1.05G Braking Turn3.FEA Linear Load Cases PlotsREF.132 190 65第32页/共36页第三十三页，共36页。Units:KN/mmX DirectionTarget X Dir.Y DirectionTarget Y Dir.Z DirectionTarget Z Dir.Front Control Arm Bracket Left19.945.12.2614.4
19、.065.Front Control Arm Bracket Right.20.205.12.5614.4.295.Rear Control Arm Bracket Left27.7720.59.8820.5.295.Rear Control Arm Bracket Right27.5420.60.9720.5.5.Engine Support Front9.439.5.155.2.013.5Engine Support Rear33.3310.18.115.2.393.5Rack house Mount Left50.7625.55.2425.8.408.Rack house Mount R
20、ight48.6825.55.5525.7.468.Stabilizer Bar Mount Left52.6310.34.485.13.4216.Stabilizer Bar Mount Right51.2810.30.585.12.8816.4.Static Stiffness Measurement Non Isolated BracketsREF.132 190 65第33页/共36页第三十四页，共36页。Frequency(Hz.)DescriptionMode 1 to 60.Rigid Body MovesMode 793.2First Torsion ModeMode 8153.85-Mode 9169.86First Crossmember bending ModeMode 10253.65First Lateral Tubes bending ModeMode 11321.0-Mode 12329.9-Mode 13366.9-6.Modal Analysis FREE FREE ConfigurationREF.132 190 65第34页/共36页第三十五页，共36页。Thank you!第35页/共36页第三十六页，共36页。