*HEADING
 TIRE AIR COUPLED ACOUSTIC MODEL
 3D HALF CROSS-SECTION TIRE MODEL  
 STEP 0: TRANSFER BASE STATE FROM tire_acoustic_axi
 STEP 1: ESTABLISH EQUILIBRIUM
 STEP 2: FOOTPRINT ANALYSIS (DISPLACEMENT CONTROL)
 STEP 3: FOOTPRINT ANALYSIS (LOAD CONTROL)
 UNITS: KG, M
*RESTART,WRITE,FREQ=100
*NODE,NSET=ROAD
 99999,   0.0,   0.0, -0.02
*SYMMETRIC MODEL GENERATION,REVOLVE,ELEMENT=1000,
NODE=1000
 0.0, 0.0, 0.0,    0.0, 1.0, 0.0
 0.0, 0.0, 1.0
 90.0, 3
 70.0, 3
 15.0, 7
 10.0, 4
 15.0, 7
 70.0, 3
 90.0, 3
*SYMMETRIC RESULTS TRANSFER
*ELSET,ELSET=FOOT,GEN
 5001, 24001, 1000
 5002, 24002, 1000
 5003, 24003, 1000
 5004, 24004, 1000
 5005, 24005, 1000 
 5007, 24007, 1000
*SURFACE,TYPE=CYLINDER,NAME=SROAD
 0., 0.,-0.31657,   1., 0.,-0.31657
 0., 1.,-0.31657
 START, -0.3, 0.
 LINE,   0.3, 0.
*RIGID BODY,REF NODE=ROAD,ANALYTICAL SURFACE=SROAD
*SURFACE,NAME=STREAD
 FOOT, S3
*CONTACT PAIR,INTERACTION=SRIGID
 STREAD, SROAD
*SURFACE INTERACTION,NAME=SRIGID
*FRICTION
 0.0,
*NSET,NSET=TIRE-SYM1
 51,54,55,15051,15054,15055
**
** NODE SETS ASYMA,ASYMB,ASYMC, and ASYMD
** USED FOR ANTI_SYMMETRY BC's
**
*NSET,NSET=ASYMA,GENERATE,UNSORTED
 1055, 14055,  1000
 1054, 14054,  1000
 1051, 14051,  1000
*NSET,NSET=ASYMB,GENERATE,UNSORTED
 29055, 16055, -1000
 29054, 16054, -1000
 29051, 16051, -1000
*NSET,NSET=ASYMC,GENERATE,UNSORTED
 1055,  6055,  1000
 1054, 14054,  1000
 1051, 14051,  1000
*NSET,NSET=ASYMD,GENERATE,UNSORTED
 29055, 24055, -1000
 29054, 16054, -1000
 29051, 16051, -1000
*EQUATION
 2
 ASYMA, 1, 1.0, ASYMB, 1,  1.0
*EQUATION
 2
 ASYMA, 2, 1.0, ASYMB, 2,  1.0
*EQUATION
 2
 ASYMC, 3, 1.0, ASYMD, 3, -1.0
*ELSET,ELSET=VIEW,GEN
 12000, 12200
 13000, 16200
********************************************
*STEP,INC=1,NLGEOM=YES
 1:  BRING TRANSFERRED RESULTS TO EQUILIBRIUM
*STATIC, DIRECT
 1.0, 1.0
*BOUNDARY,OP=NEW
 TIRE-RIM,  1, 6
 TIRE-SYM1, 1, 2
 ROAD, 1, 6
*DSLOAD,OP=NEW
 TIRE-LINER, P, 200.E3
*NODE PRINT,NSET=ROAD,FREQ=100
 U,
 RF,
*EL PRINT,FREQ=0
*OUTPUT,FIELD,FREQ=1
*NODE OUTPUT
 U
*ELEMENT OUTPUT
 S,LE
*OUTPUT,HISTORY,FREQ=1
*NODE OUTPUT, NSET=ROAD
 U, RF
*END STEP
******************************************
*STEP,INC=100,NLGEOM=YES
 2:  FOOTPRINT (Displacement controlled)
*STATIC
 0.2, 1.0
*BOUNDARY,OP=NEW
 TIRE-RIM,  1, 6
 TIRE-SYM1, 1, 2
 ROAD, 1, 2
 ROAD, 4, 6
 ROAD, 3, , 0.02
*ADAPTIVE MESH,ELSET=AIR,FREQ=1,MESH SWEEP=5
*PRINT,ADAPT=YES
*END STEP
****************************************
*STEP,INC=100,NLGEOM=YES
 3:  FOOTPRINT (Load controlled)
*STATIC
 1.0, 1.0
*BOUNDARY,OP=NEW
 TIRE-RIM,  1, 6
 TIRE-SYM1, 1, 2
 ROAD, 1, 2
 ROAD, 4, 6
*CLOAD, OP=NEW
 ROAD, 3, 1650.
*ADAPTIVE MESH,ELSET=AIR,FREQ=1,MESH SWEEP=5
*PRINT,ADAPT=YES
*END STEP