Passive Shock Isolation Utilising Dry Friction

Figure 6

Time histories and phase plane plots for the case of soft (frequency ratio , stiffness ratio ) and medium (frequency ratio , stiffness ratio ) secondary spring stiffness compared to the primary spring under a versed sine base input, mass ratio . (a) Primary mass displacement. (b) Primary mass velocity. (c) Primary mass phase plane plot. (d) Secondary mass displacement. (e) Secondary mass velocity. (f) Secondary mass phase plane plot.