Dallara Automobili – GP2 user manual
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The data refers to the component stiffness: one side of the ARB (one drop link) is considered fixed
and on the other one the stiffness is measured.
The stiffness in this case is F/displ (on one side).
If you need the ARB stiffness @ Ground you have to use what we call AntiSymmetric Model Stiffness
that is 2*component stiffness.
In this case in fact, analyse the roll behaviour of the ARB and you have to consider that both the
sides of the component are moving: under the same force F applied, the displacements will be
displ/2 on one side and -displ/2 on the other side.
The stiffness, as explained, will be 2*component stiffness [F/(displ/2)].
The ARB stiffness @ Ground is AntiSymmetric Model Stiffness/MRarb^2.
