A systematic analysis of the dynamic behavior of a gear-bearing
system with nonlinear suspension, turbulent flow effect, long journal bearing
approximation, nonlinear oil-film force and nonlinear gear mesh force is
performed in the present study. The dynamic orbits of the system are observed by bifurcation
diagrams plotted using the dimensionless unbalance coefficient and the dimensionless
rotational speed ratio as control parameters. The onset of chaotic motion is
identified from the phase diagrams, power spectra, Poincaré maps, Lyapunov
exponents and fractal dimension of the gearbearing system. The numerical
results reveal that the system exhibits a diverse range of periodic,
sub-harmonic, quasiperiodic and chaotic behaviors. The results presented in
this study provide some useful insights into the design and development of a
gear-bearing system for rotating machinery that operates in highly rotational
speed and highly nonlinear regimes.
Cite this paper
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