This analysis run successfully on my Ansys. Try it!
PNAME='MovingLoad' ! Problem file name
/FILNAME, PNAME, ON
/PREP7
ET, 1, SOLID45
MP, EX, 1, 2.857E10
MP, PRXY, 1, 0.3
MP, DENS, 1, 7850
MP, EX, 2, 2.857E10
MP, PRXY, 2, 0.3
MP, DENS, 2, 0
bb= 1
hh= 0.5
ll= 10
ESIZE, 0.5, 0,
ESEL, NONE
VSEL, NONE
NSEL, NONE
BLOCK, 0, ll, -hh, 0, -(bb/2), (bb/2),
TYPE, 1
MAT, 1
VMESH, ALL
CM, E_BEAM, ELEM
CM, N_BEAM, NODE
NSEL, R, LOC, Y, 0
CM, N_TARGET, NODE
ESIZE, 0.25, 0,
ESEL, NONE
VSEL, NONE
NSEL, NONE
BLOCK, 0, hh, 0, (hh/2), -(bb/2), (bb/2),
TYPE, 1
MAT, 2
VMESH, ALL
CM, E_TIRE, ELEM
CM, N_TIRE, NODE
NSEL, R, LOC, Y, 0
CM, N_CONTA, NODE
ET, 2, COMBIN40 ! Spring-mass-damper elements for wheels (standard gap)
KEYOPT, 2, 1, 1 ! Standard gap=0/ Lock on contact=1,
KEYOPT, 2, 3, 2 ! Element DOF X=1/ Y=2/ Z=3/...
KEYOPT, 2, 6, 2 ! Mass on node J
R, 2, 0, 0, 5000, 0, 0, 200000 ! K1, C, M, GAP, FSLIDE, K2
N, 10000, 0.25, 0.5, 0
TYPE, 2 ! Sping-mass-damper COMBIN40
REAL, 2
ESEL, NONE
E, NODE(0.25, 0.25, 0), 10000
CM, E_MASS, ELEM
NSEL, S, LOC, X, 0
NSEL, R, LOC, Y, -hh
CM, N_HINGED, NODE
NSEL, S, LOC, X, ll
NSEL, R, LOC, Y, -hh
CM, N_ROLLER, NODE
!==========================================================================================================
! CONTACT PAIRS MODELING
!==========================================================================================================
MAT, 1
ET, 2000, 170 ! Target
ET, 3000, 174 ! Contact surface-to-surface
!ET, 3000, 175 ! Contact node-to-surface
R, 3000, , , 1, 0.1, 0,
!RMORE, , , 1.0E20, 0.0, 1.0,
!RMORE, 0.0, 0, 1.0, , 1.0, 0.5
!RMORE, 0, 1.0, 1.0, 0.0, , 1.0
!RMORE, 10.0
KEYOPT, 3000, 1, 0
KEYOPT, 3000, 2, 0 ! Augmented Lagrange 0, Penalty Method 1
KEYOPT, 3000, 4, 0
KEYOPT, 3000, 5, 3 ! Close gap 1/ Reduces initial penetration 2/ Both 3
KEYOPT, 3000, 7, 2 ! Automatic bisection of increment 1, maintain reasonable 2
KEYOPT, 3000, 8, 0
KEYOPT, 3000, 9, 0 ! Include 0 / Exclude initial penetration 1
KEYOPT, 3000, 10, 2 ! Update contact stiffness at each iteration
KEYOPT, 3000, 11, 0 ! Beam/Shell thickness effect 1
KEYOPT, 3000, 12, 2 ! No separation
REAL, 3000
NSEL, S, , , N_TARGET
TYPE, 2000
ESLN, S, 0
ESURF
! Generate the contact surface
NSEL, S, , , N_CONTA
TYPE, 3000
ESLN, S, 0
ESURF
ALLSEL, ALL
/VIEW,1,1,1,1
/ANG,1
/REP,FAST
!==========================================================================================================
! SOLUTION
!==========================================================================================================
/SOL ! Analysis
/OUTPUT, PNAME, 'output', '',
VT= 15 !m/s
w1= (2.3239) ! Frequency of the first mode
w2= (3.0149) ! Frequency of the second mode
xi= 0.02 ! Constant damping ratio (2%)
adamp= (2*xi*w1*w2)/(w1+w2) ! External damping coefficient
bdamp= (2*xi)/(w1+w2) ! Internal damping coefficient
ALPHAD, adamp
BETAD, bdamp
D, N_HINGED, UX, 0, , , , UY, UZ
D, N_ROLLER, UY, 0, , , , UZ,
D, N_TIRE, UZ, 0
D, 10000, UZ, 0
TSTEP= 0.0015
ANTYPE, TRANS
NROPT, FULL
LUMPM, ON
NLGEOM, ON
LNSRCH, AUTO
SOLCONTROL, ON
AUTOTS, OFF
OUTRES, ALL, ALL
D, N_TIRE, UY, 0
D, N_TIRE, UX, 0
D, 10000, UX, 0
CMACEL, E_MASS, , 10, , ! Apply gravitational acceleration on mass dofs of vehicle only
TIMINT, OFF
KBC, 1 ! Stepped load
TIME, 0.001
NSUBST, 2
SOLVE
DDELE, N_TIRE, UY
*DIM, XDISP, TABLE, 2, 1, 1, TIME, , , 0
D, N_TIRE, UX, %XDISP%
D, 10000, UX, %XDISP%
XDISP(1, 0)= 0, (ll)/VT
XDISP(1, 1)= 0, (ll)
TIMINT, ON
KBC, 0 ! Ramped load
TIME, ((ll-0.5)/VT)
DELTIM, TSTEP
SOLVE
/OUTPUT, TERM
SAVE
FINISH