ADAMS的装配、静态、运动学、动力学仿真.doc

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1、AboutAdjustingYourModelBeforeSimulationBeforeyoubeginyoursimulation,youmaywanttodooneormorepreliminaryoperationstohelpensureabettersimulation.Youcandoanyofthefollowing:•Checktoseeifyouhavetheexpectednumberofmovablepartsandtheexpectednumberandtypeofconstraintsinyourmodel.•Dete

2、rminethetotalnumberofsystemdegreesoffreedom(DOF)andwhich,ifany,constraintequationsareredundant.Learnmore.•Checktoseeifanyconstraintsarebrokenorincorrectlydefinedand,ifso,performaninitialconditionssimulationonyourmodeltotrytocorrectthesebrokenjoints.Learnmore.•Performastaticsi

3、mulationtomoveyourmodelintoanequilibriumconfigurationimmediatelybeforeperformingadynamicsimulationtoreducesomeoftheinitial,transientsystemresponse.•Calculatethenaturalfrequenciesofyourmodelaslinearizedaboutaparticularoperatingconfiguration.LearnmorePerformingInitialConditions

4、SimulationYoucanperformaninitialconditionssimulationtocheckforanyinconsistenciesinyourmodel.Theinitialconditionssimulationisoftenreferredtoasanassemblemodeloperation.Aninitialconditionssimulationtriestoreconcileanypositioninginconsistenciesthatexistinyourmodelatitsdesignconfi

5、gurationandmakeitsuitableforperforminganonlinearorlinearsimulation.Mostimportantly,theinitialconditionssimulationtriestoensurethatalljointconnectionsaredefinedproperly.Forexample,forarevolutejointtobedefinedproperly,theoriginsofthemarkersthatdefinethejointmustbecoincidentthro

6、ughoutasimulation.Ifthemarkersarenotcoincident,thejointisbrokenandneedstoberepaired.Inthisexample,theinitialconditionssimulationhelpsrepairthebrokenrevolutejointbymovingtheoriginsofthetwomarkersuntiltheyarecoincident,asshowninthefollowingfigure.ConsistentGearsthatBecomeIncons

7、istentInthecaseofthedoorwithtwohinges,Adams/Solverignoresfiveoftheconstraintequationsthatitfindsredundant.YoudonotknowwhichequationsAdams/Solverignores,however.IfAdams/Solverignoresalloftheequationscorrespondingtooneofthehinges,thenallthereactionforcesareconcentratedattheothe

8、rhingeintheAdams/Solversolution.Adams/Solverarbitrarilysetsthereacti