Coulomb Damping - Page 3
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| The results of the analysis are shown in figure 1, which is repeated here. The locus of the force versus velocity points is seen to overlay the coulomb curve definition. |
| Further results are shown in figures 4 to xx which show the responses of the element and the free node. |
| Figure 1. Coulomb Damping Force versus velocity relationship. |
| Figure 5. Spring only Force versus time. |
| Figure 4 shows clearly the ratcheting effect of the friction damping curve on the force. In this case only the damping force is plotted. |
| Figure 4. Friction only Force time. |
| Figure 5 shows the decaying spring force in the CBUSH. This excludes the damping force. The spring force is reducing as energy is taken out of the system and the CBUSH displacement decays - hence reducing the spring force. |
| Figure 6 Total Force versus time. |
| seen overlaid on the smooth spring curve. |