*HEADING
 HYPERELASTIC TIRE AIR COUPLED ACOUSTIC MODEL WITH TRANSPORT EFFECTS
 3D HALF CROSS-SECTION TIRE MODEL
 STEP 0: TRANSFER BASE STATE FROM sst_acoustic_axi
 STEP 1: ESTABLISH EQUILIBRIUM
 STEP 2: FOOTPRINT ANALYSIS (DISPLACEMENT CONTROL)
 STEP 3: FOOTPRINT ANALYSIS (LOAD CONTROL)
 UNITS: KG, M
*RESTART,WRITE,OVERLAY
*NODE,NSET=ROAD
**
** CIRCUMFERENTIALLY HOMOGENEOUS MESH IS MORE APPROPRIATE
** FOR DYNAMIC / ACOUSTIC ANALYSIS: USE 10 DEGREE ELEMENTS
**
*SYMMETRIC MODEL GENERATION,REVOLVE,ELEMENT=1000,NODE=1000
*SYMMETRIC RESULTS TRANSFER
*ELSET,ELSET=FOOT,GEN
*SURFACE,TYPE=CYLINDER,NAME=SROAD
 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
**
*ELSET,ELSET=VIEW,GEN
****************************
*NSET,NSET=ASYMA,GENERATE,UNSORTED
*NSET,NSET=ASYMB,GENERATE,UNSORTED
*NSET,NSET=ASYMC,GENERATE,UNSORTED
*NSET,NSET=ASYMD,GENERATE,UNSORTED
*EQUATION
 ASYMA, 1, 1.0, ASYMB, 1,  1.0
*EQUATION
 ASYMA, 2, 1.0, ASYMB, 2,  1.0
*EQUATION
 ASYMC, 3, 1.0, ASYMD, 3, -1.0
********************************************
*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