Adams_solver

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1、1AboutAdams/SolverAboutAdams/Solver2Adams/SolverConventionsThroughoutthehelp,thefollowingtypestylesareusedasvisualcues.Style:Indicates:NameAstringthatisalegalnameforuseininterfaceproducts.Thefollowingcriteriamustbemetinorderforalegalstringtobedefined:•Thenamemayonlycontainalphanumeri

2、ccharacters(upperandlowercase).•Nowhitespaceinthename.•Nospecialcharactersinthename(e.g.@#$%^&*).Theexceptiontothisruleistheunderscore'_'character.•Namesmustbeginwithanalphacharacteroranunderscore.(e.g.4barisnotlegal,while_4barislegal).xArgumentsinAdamssubroutinesandfunctionsiParamet

3、ersthatfollowastatement,command,orargument:i=Integerr=Realc=Characterstring(alphanumeric)e=Functionexpressionv=Varyingtype(integer,real,oralphanumeric)id=Identifierx,y,z=Cartesiancoordinate(real)a,b,c=Angularcoordinate(real)PARTMinimumabbreviationsofstatements,commands,andarguments{}

4、Selectionyoucanmakefromaseriesofitems[]Optionalselectionyoucanmakefromaseriesofitems[[]]CombinedselectionyoucanmakefromaseriesofitemsATwo-dimensionalmatricesaOne-dimensionalmatricesRVectors1xˆUnitvectors3AboutAdams/SolverBestPracticesThissectioncontainsgeneraltipsonadvancedmodelingwi

5、thAdams/Solver.•Discontinuities•Units•DummyParts•Joints•Motions•Forces•Contacts•Subroutines•Simulation/Integrators•Debugging•MiscellaneousTipsDiscontinuities•Discontinuitiesaretherootcauseofmostsimulationproblems.Avoidthem.•Examplesofdiscontinuousfunctions:MIN,MAX,DIM,MOD,IF.•Discont

6、inuousdisplacementsandvelocitiescausecorrectorandintegratorfailures.•Discontinuousaccelerationscauseintegrationfailures(requiresinfiniteforce).•Discontinuousforcescausecorrectorfailures.Units•Widelyseparatedmagnitudesinamatrixcancausenumericdifficulties(conditioningproblems).•Becaref

7、ulwhenusinginconsistentunits.•Chooseunitssothatmodelstates(displacementsandvelocities)arereasonablevalues.Forexample,choosing"mm"fordisplacementsofarocketwhichtravelsthousandsofkilometersisapoorchoice.•Chooseunitssothatstiffnessvaluesarenotverylarge.•Choosetimeunitsappropriatetotheph

8、enomenabeing