Control of Rotor Motion Using Active Fluid-Film Bearings

Савин, Леонид; Shutin, Denis

doi:10.1007/978-3-319-06590-8_91

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…where From the formulas that determine the unknowns a, b, c and d, it is obvious that the amplitudes of the forced and natural oscillations of the system depend on the natural frequency of the system and they are interdependent [24]. This is one of the specific features of a nonlinear system.…”

Section:  mentioning

confidence: 99%

Parametric Analysis of Nonlinear Oscillations of the “Rotor-Weakly Conductive Viscous Fluid-Foundation” System under the Action of a Magnetic Field

Kydyrbekuly,

Zhauyt,

Ibrayev

2023

Preprint

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The generalized dynamic model of the rotor system, presented in the paper, is the first model that takes into account the interconnected oscillations of the “rotor - weakly conductive fluid – foundation” system under the action of such parameters as fluid and rotor motion, linear eccentricity, friction forces, foundation vibration and nonlinear characteristics of rolling bearings, as well as the action of a magnetic field on the fluid. Consistent equations of motion for the system “rotor - weakly conductive fluid – foundation” were derived and solved analytically. Forced and natural oscillations of the system were analyzed, and the distinctive features of the rotor system dynamics were revealed. The values of frequencies and amplitudes, which are one of the main factors determining the dynamic behavior of the system, were obtained and studied.

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Section:  mentioning

confidence: 99%

Parametric Analysis of Nonlinear Oscillations of the “Rotor-Weakly Conductive Viscous Fluid-Foundation” System under the Action of a Magnetic Field

Kydyrbekuly,

Zhauyt,

Ibrayev

2023

Preprint

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“…From the formulas that determine the unknowns a, b, c and d, it is obvious that the amplitudes of the forced and natural oscillations of the system depend on the natural frequency of the system and they are interdependent [41]. This is one of the specific features of a nonlinear system.…”

Section: ∂(Ur) ∂Rmentioning

confidence: 99%

Parametric Analysis of Nonlinear Oscillations of the “Rotor–Weakly Conductive Viscous Fluid–Foundation” System under the Action of a Magnetic Field

Kydyrbekuly,

Zhauyt,

Ibrayev

2023

Applied Sciences

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The generalized dynamic model of the rotor system, presented in this paper, is the first model that takes into account the interconnected oscillations of the “rotor–weakly conductive fluid–foundation” system under the action of parameters such as fluid and rotor motion, linear eccentricity, friction forces, foundation vibration and nonlinear characteristics of rolling bearings, as well as the action of a magnetic field on the fluid. Consistent equations of motion for the “rotor–weakly conductive fluid–foundation” system were derived and solved analytically. Forced and natural oscillations of the system were analyzed, and the distinctive features of the rotor system dynamics were revealed. The values of frequencies and amplitudes, which are one of the main factors determining the dynamic behavior of the system, were obtained and studied.

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“…The basic trend in rotor dynamics is parametric optimization of rotor attributes, such as geometry of bearings and seals, masses and supports distribution by shaft length, etc, respect to forced oscillations caused by the centrifugal forces (unbalance), that problems a big number of papers lately are dedicated [13][14][15][16][17][18][19][20]. The main controversial problem of parametric optimization is the determination of the quality criteria for a specific rotor system.…”

Section: Energy Efficiency Of Rotor Systemmentioning

confidence: 99%

Estimation of Energy Efficiency of Oscillations of Rotors on Radial Fluid Film Bearings

Majorov

Савин

Babin

2018

Proceedings of the 4th International Conference on Industrial Engineering

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The following parameters have the most influence on the dynamics of a high-speed turbomachine's rotor system: mass and stiffness distribution of a rotor; damping properties of the materials of rotor's elements; location of bearings, sealings, and dampers; type, design, and operational conditions of bearings, sealings, and dampers; mass and inertia characteristics of machine's housing; and operational conditions of a turbomachine itself. It should be noted that the presence of fluid film bearing complicates the dynamic analysis. It is thus a quite urgent task to search for some rational parameters when a rotor system is under design and preliminary calculation, which in many cases leads to the problems of an optimal parametric design. One of the main yet controversial problems of parametric design in the field of rotor system dynamics is the determination of quality indicators for a particular case of a rotor system. The present paper proposed a criterion based on the efficiency of rotor system's input energy. The analysis of a number of parameters', e.g., values of constant external forces (rotor's mass), varying external forces (imbalance), and types of bearings, influence on this criterion has also been carried out.

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Control of Rotor Motion Using Active Fluid-Film Bearings

Cited by 7 publications

References 2 publications

Parametric Analysis of Nonlinear Oscillations of the “Rotor-Weakly Conductive Viscous Fluid-Foundation” System under the Action of a Magnetic Field

Parametric Analysis of Nonlinear Oscillations of the “Rotor-Weakly Conductive Viscous Fluid-Foundation” System under the Action of a Magnetic Field

Parametric Analysis of Nonlinear Oscillations of the “Rotor–Weakly Conductive Viscous Fluid–Foundation” System under the Action of a Magnetic Field

Estimation of Energy Efficiency of Oscillations of Rotors on Radial Fluid Film Bearings

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