simpack_how-to-model-a-mcpherson-suspension (1).pdf

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1、IngenieurgesellschaftfürneueTechnologienGmbHHowtomodelaMcPhersonSuspension1.1.GeneralThebasiccomponentofallautomotivemodelsisitssuspension.Thisguideshowshowtoset-upthemostclassicalfrontsuspensionsystemofapassengercar.Itgivesageneraloverviewaboutthetopolo

2、gyofsuspensionmodelsandcanbeusedasafundamentalmodelforyourfurtherwork.Themodelcanbefurtherextendedorparameterisedforuseinvariousdifferentapplications.PleasenotethatintheAutomotive+databaseafullyparameterisedmodeloftheMcPhersonsuspensionisavailablealongwi

3、thmanyotherstandardsuspensions.2.2.AdditionalFeaturesDuringthemodelset-upitwillalsobeshown,howtoperformequilibriumcalculationsandeigenvaluecalculationsaswellashowtoanimatethemodeshapes.3.3.CreatinganExampleModel3.1.ConceptThemodelisasimplemodeltoallowyou

4、tounderstandthetopologyandtheconceptsinSIMPACK.Designingsuspensionsystemsisacomplicatedprocessduetotheclosedloopsinvolved.It’sveryimportanttoconsiderthetopologyofthesystembeforestartingtobuild-upthemodelinSIMPACK.Youshouldbuild-upthemodelstep-by-step.Def

5、inethebodiesfirstandthenconnectthemtogetherinachain.Finallyclosetheloops.Forceelementswillbedefinedfirstwithconstantcharacteristicsbutlateronyoucandefinenon-linearcharacteristicsusinginputfunctionsforyourownmodels.INTECGmbH,ArgelsriederFeld13,D-82234Wess

6、ling,Tel.0049815392880,Fax498153928811,E-Mailintec@simpack.de,Seite1IngenieurgesellschaftfürneueTechnologienGmbH3.2.Modelling3.2.1TrytoseparateaMcPhersonsuspensionintorigidbodies.Determinehowthebodiesaretobeconnectedtogetherincludinghowmanydegreesoffreed

7、omtheyhaveandwhatforcesactbetweenthem.WerecommendwhenworkingwithSIMPACKtofirstcreatethetopologyofthemodeltohelpyouunderstandhowyourmodelistogotogether.Lookatthetopologyoftheintendedmodelwiththeexplanationofthesymbolsused.springgzx,y,zzdamper_upperdamper_

8、upperdamper_lower0DOFspringdamper_lowerdamper?damperx,y,zwheelchassis?,?steering_rodwheel_plateJoints:armwheel?Constraints?,?:,?tyrezzForcearmElements:chassistyre3.2.2Defineanewmodelandstartthemodelsetupwindow,usingtheicon