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Under the sliding bearing support for the rotor-bearing system,the dynamic model of a rotor-bearing system is established under the action of non-linear oil film force.The rotor-bearing system has been studied by the application of nonlinear dynamics theory,and the system′s response was obtained by the numerical integration approach.The effects of eccentricity,speed,lubricant viscosity,radius gap,bearing length and journal radius on the system′s response have been studied by using an amplitude-frequency curve,three-dimensional spectrum and bifurcation,which provides a theoretical basis for the diagnosis of the oil whirl fault effectively in the rotor-bearing system supported by a sliding bearing.
Under the sliding bearing support for the rotor-bearing system, the dynamic model of a rotor-bearing system is established under the action of non-linear oil film force. The rotor-bearing system has been studied by the application of nonlinear dynamics theory, and the system’s response was obtained by the numerical integration approach. The effects of eccentricity, speed, lubricant viscosity, radius gap, bearing length and journal radius on the system’s response have been studied by using an amplitude-frequency curve, three -dimensional spectrum and bifurcation, which provides a theoretical basis for the diagnosis of the oil whirl fault effectively in the rotor-bearing system supported by a sliding bearing.