价值8500RMB的分析报告flywheelreport.docx
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价值8500RMB的分析报告flywheelreport.docx
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价值8500RMB的分析报告flywheelreport
REPORTRA-07-H4-00040
february2007
structuralanalysisofflywheelforDV6D/BE4
Writtenby
Approvedby
StructureAnalysis
Distribution
1.Introduce
Thisreportdescribesthe3DfiniteelementanalysisflywheelforDV6D/BE4withrespecttostrengthandResonnancefrequency.
2.Subject/Objectives
Thesubjectofthisinvestigationisthestructuralanalysisofthenodularcastironflywheelunderworstcaseoperationfor..ForthispurposetheFE-Modelassemblyoftheflywheelstructurewillbegeneratedconsistingof:
∙flywheelbolts
∙apartofcrankshaft
∙teethring
Theabovedescribedstructurewillbeanalyzedwithrespecttofollowingloadcases
∙burstanalysis,
∙Maximumtransmittorqueanalysis
∙Resonancefrequencyofthepartonthecrankshaft
3.InputDataandBoundaryConditions
3.1FiniteElementModelling
TheFE-modelisbasedonCAD-ModelandwasgeneratedusingtheFE-Pre-processorHYPERMESH.Abaqus6.5andfemfat4.6wasusedsolver.TheFE-modelareshowninfigure1,tennodestetrahedralelementsareused.
3.2MaterialData
ThematerialusedfortheFEanalysisareshownintable1.
Table1
Part
Material
Modulusofelectricity(GPa)
Poissonratio
Density(Kg/m3)
UTS
(Mpa)
Flywheel
QT500-7
145
0.26
7400
500
bolt
steel
200
0.3
7800
Teethring
steel
200
0.3
7800
Crankshaft
steel
200
0.3
7800
3.3Boundaryconditions
Themodelisconstrainedontheoneendofcrankshaft,theloadsandfitsusedarelistedontable2..
Table2
loads
Boltforce(kN)
Interference(mm)
burstanalysis
enginespeed10000rpm
33.3
0.25
Maximumtransmittorqueanalysis
900N.m
Resonance
4.Results
burstanalysis:
theminimumsafetycoefficientis1.14.theresultsofstressareshowninfig2—fig3.theresultsofdeformationareshowninfig4.theresultsofsafetycoefficientareshowninfig5—fig6.
Maximumtransmittorqueanalysis:
safetycoefficientis2.12.theresultsofstressareshowninfig7—fig8.theresultsofdeformationareshowninfig9.theresultsofsafetycoefficientareshowninfig10—fig11.
Resonance:
Resonancefrequencyofflywheel(withteethring)is411Hz.theshapeareshowninfig12—fig13.Resonancefrequencyofflywheel(withoutteethring)is362Hz.
5.Conclusions
Flywheelcanresistenginespeed10000rpm.
Flywheelcanresist900N.mtorque.
Resonancefrequencyofflywheelbeyond250Hz
fig1FlywheelFEmodel
fig2Stressdistributionat10000rpm(DeformationScaleFactor100)
fig3Stressdistributionat10000rpm
fig4Displacementat10000rpm(DeformationScaleFactor100)
fig5Strengthsafetyfactorat10000rpm
fig6Strengthsafetyfactorat10000rpm
fig7Stressdistributionat900Nm
fig8Stressdistributionat900Nm
fig9Displacementat900Nm(DeformationScaleFactor100)
fig10Strengthsafetyfactorat900Nm
fig11Strengthsafetyfactorat900Nm
fig12Firstmodeat411Hz(DeformationScaleFactor30)
fig13Firstmodeat411Hz(DeformationScaleFactor30)
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