Using the Soft-Soil tire model

Using the Soft-Soil tire model
Example of the required Soil properties in the Road Data File:
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Example of the required Soil properties in the Road Data File:
Existing road data files can be used, but a 'SOIL_PROPERTIES' section has to be added:
$-----------------------------------------------------SOIL_PROPERTIES
[SOIL_PROPERTIES]
FRICTION_ANGLE = 37.2 $units: degree
COHESION_STRESS = 8.0E-4 $units: N/mm**2
SOIL_DEFORM_MOD_KX0 = 43.0 $units: mm
SOIL_DEFORM_MOD_KX1 = 0.6283 $units: mm/deg
SOIL_DEFORM_MOD_KY0 = 20.0 $units: mm
SOIL_DEFORM_MOD_KY1 = 0.2269 $units: mm/deg
!visco-elastic tire:
ELASTIC_MODULUS_G1 = 0.071E-3 $units: N/mm**3
ELASTIC_MODULUS_G2 = 1.072E-3 $units: N/mm**3
SOIL_VISCOSITY = 7.14E-3 $units: Ns/mm**3
!plastic-elastic tire:
PRESSURE_SINKAGE_KC = 1.37E-3 $units: N/mm**(n+1)
PRESSURE_SINKAGE_KFI = 8.14E-4 $units: N/mm**(n+2)
SINKAGE_EXPONENT = 1 $units: = n
SOIL_INTERACTION_A0 = 0.4 $units: -
SOIL_INTERACTION_A1 = 0.15 $units: -
SOIL_STIFFNESS = 8.14E-3 $units: N/mm**3
Symbols
B eff
b
c
c rol
D eff
C z
C s
f 0
effective rolling radius factor
tire/wheel width
cohesion
tire rolling resistance coefficient
effective rolling radius factor
tire vertical stiffness
soil stiffness
tire deflection
d
dimensionless tire deflection
f 0
f0,F
z 0
G 1
G 2
F eff
F x
nominal tire deflection
elastic modulus
elastic modulus
effective rolling radius factor
longitudinal force