Table 8.

Optimized coefficients.

Drop Height H (dm)	10			15
Number of layers n	8	9	10	9	10
Number of iterations	278	152	205	234	221
First part stiffness multiplier $k_1$ (-)	2.75	2.89	2.99	3.14	3.07
Stiffness multiplier $k_e$ (-)	3.41	3.47	3.55	1.69	2.29
Yield stress multiplier $k_y$ (-)	1.00	0.91	0.88	1.16	1.04
Acceleration error $E_s$ (%)	3	3	2	2	3
Displacement error $E_d$ (%)	1	1	1	0	1