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Figure 2: Finite element model for cylindrical shaft and bearings: (a1) and (a2) six translational springs modeling; (b1) and (b2) four translational and two rotational springs modeling; (c1) and (c2) eight translational springs modeling; (d1) and (d2) eight translational and two rotational springs modeling; (e1) and (e2) twelve translational springs modeling.