Research Article
Phase Portraits of the Autonomous Duffing Single-Degree-of-Freedom Oscillator with Coulomb Dry Friction
Table 1
Equilibrium points of the linear system.
| | | | | |
| | | Saddle | Inf. num. of equilibrium points | Unstable node Unstable inflected node Unstable focus |
| | Saddle | Inf. num. of equilibrium points | Centre |
| | | Saddle | Inf. num. of equilibrium points | Stable node Sable inflected node Stable focus |
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