Shock and Vibration / 2016 / Article / Fig 3

Research Article

Nonlinear Model and Qualitative Analysis for Coupled Axial/Torsional Vibrations of Drill String

Figure 3

Bifurcations of the system under torsional excitation.
(a) Bifurcation diagram of the axial modal
(b) Bifurcation diagram of the torsional modal