tire_road_models.pdf

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1、RoadModelsinAdams/Tire2Adams/TireUsingthe2DRoadModelUsingthe2DRoadModelThissectionofthehelpprovidesdetailedtechnicalreferencematerialforusingAdams/Tiretodefineroadsalongwhichtomaneuveravehicle.ItassumesthatyouknowhowtorunAdams/Car,Adams/Solver,Adams/View,orAdams/Chassis.Italsoassumesthatyouhaveamo

2、derateleveloftire-modelingproficiency.The2DRoadmodelletsyoumodeltwo-dimensionalroadexcitations,includingaflatroad.Learnabout:•2DRoadTypes•Examplesof2DRoads•2DRoadModelParameters2DRoadTypesTheavailableroadtypesare:•DRUM-Tiretestdrum(requiresazero-speed-capabletiremodel).•FLAT-Flatroad.•PLANK-Single

3、plankperpendicular,orinobliquedirectionrelativetox-axis,withorwithoutbeveledges.•POLY_LINE-Piece-wiselineardescriptionoftheroadprofile.Theprofilesfortheleftandrighttrackareindependent.•POT_HOLE-Singlepotholeofrectangularshape.•RAMP-Singleramp,eitherrisingorfalling.•ROOF-Singleroof-shaped,triangula

4、robstacle.•SINE-Sinewaveswithconstantwavelength.•SINE_SWEEP-Sinewaveswithdecreasingwavelengths.•STOCHASTIC_UNEVEN-Syntheticallygeneratedirregularroadprofilesthatmatchmeasuredstochasticpropertiesoftypicalroads.Theprofilesforleftandrighttrackareindependent,ormayhaveacertaincorrelation.Examplesof2DRo

5、adsSamplefilesforalltheroadtypesforAdams/CarareinthestandardAdams/Cardatabase:install_dir/shared_car_database.cdb/roads.tbl/SamplefilesforalltheroadtypesforAdams/Tirearein:install_dir/solver/atire/SamplefilesforalltheroadtypesforAdams/Chassisarein:RoadModelsinAdams/Tire3Usingthe2DRoadModelinstall_

6、dir/achassis/examples/rdf/Notethatyoumustselectaspecificcontactmethod,suchaspoint-followerorequivalentplane,todefinehowtheroadswillinteractwiththetires.Notallcombinationsofroad,tire,andcontactmethodsarepermitted.AllowablecombinationsareexplainedinTireModelshelpunderthedescriptionofthespecifictirem

7、odel.2DRoadModelParametersThe[PARAMETERS]blockmustcontainthefollowingdata,someofwhichareindependentofthetypeofroad.Learnaboutparameters:•IndependentofRoadType•Drum•Flat•Plank•Polyline•Pothole•Ramp•Roof•Sine•Sweep