Vibration of the Duffing Oscillator: Effect of Fractional Damping

Abstract

We have applied the Melnikov criterion to examine a global homoclinic bifurcation and transition to chaos in a case of the Duffing system with nonlinear fractional damping and external excitation. Using perturbation methods we have found a critical forcing amplitude above which the system may behave chaotically. The results have been verified by numerical simulations using standard nonlinear tools as Poincare maps and a Lyapunov exponent. Above the critical Melnikov amplitude ${\mu }_c$, which is the sufficient condition of a global homoclinic bifurcation, we have observed the region with a transient chaotic motion.

13 pages, 6 figures. Shock and Vibration, in press

References in corpus (1)

• Response of parametrically-driven nonlinear coupled oscillators with application to micro- and nanomechanical resonator arrays