Nonlinear dynamics of cracked rotor system with fractional order damping is investigated with a response-dependent breathing crack model. The fourth order Runge-Kutta method and tenth order continued fraction expansion Euler(CFE-Euler)method are introduced to simulate the proposed system equation of fractional order cracked rotors. The effects of derivative order of damping
rotating speed ratio
crack depth
orientation angle of imbalance relative to the crack direction and mass eccentricity on the system dynamics are demonstrated by bifurcation diagram
Poincare map and rotor trajectory diagram. The results show that the rotor system gets chaotic
quasi-periodic and periodic as the fractional order increases. It is also found that the imbalance eccentricity level
crack depth
rotational speed
fractional damping and crack angle all exert considerable influence on the nonlinear behaviors of cracked rotor system.
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references
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