Dear sir,

In caesar how can we model roller support?
what my doubt was drum saddle was rest on saddle wich has rollers,that rollers has stop at 10mm.after 10 mm it will act as sliding support, how can we model this type of support?

My suggestion :
Set a gap 10 mm in this horizontal direction.
Set a restraint in this horizontal direction with a low stiffness
Control the result ( Force on this restraint node).
If this Force about the horizontal friction force =(weight force) times (frition factor (slide)), then i think your model ok.
Isnt the case, then iterativ change your friction factor until the result Force is about the horizontal friction force.