Hi there,
I am carrying out an analysis of a tyre by employing steady state transport analysis in Abaqus. According to abaqus example manual in order to obtain braking conditions, translational ground velocity has to be applied in combination with a spinning angular velocity to NTIRE node set, which effectively constitutes of all tyre nodes, by using *TRANSPORT VELOCITY and *MOTION options. My question is why translational velocity was applied to the whole tyre, which apparently fixed at a rim node of a tyre. Should not it be applied to the reference node of a road suraface instead? I would greatly appreciate if anybody, who has dealt with tyre simulation, explained this specific matter? Thank you very much for any help you can provide!
*STEP,INC=300,NLGEOM=YES,UNSYMM=YES
1: STRAIGHT LINE ROLLING (Full braking)
*STEADY STATE TRANSPORT, LONG TERM
*CHANGE FRICTION,INTERACTION=SRIGID
*FRICTION,SLIP=0.02
1.0
*TRANSPORT VELOCITY
NTIRE, 8.0 (assignment of an angular velocity, which is equal to 8 rad/sec and it is of such value so as to ensure that braking conditions are taking place)
*MOTION,TYPE=VELOCITY,TRANSLATION
NTIRE, 1, , 2.7778 (assignment of a translational ground velocity, which is equal to 2.77778 m/sec)