The damping constant is the ratio between damping force and
squeeze velocity. The damping constant can be used to
calculate the amplitude of motion around L and the
hydrostatic pressure p when the piston is subjected to
sinusoidal vibrations F(t) or when shock loaded.
normalised impuls is the averaged damping force from
starting position L=0 to L. The normalised impuls can be
used to calculate the displacement of the piston when
subjected by F(t) during t.