Dynamics of a high-revolution compressor

A method for calculating amplitudes and constructing frequency characteristics of forced and self-excited vibrations of a rotor-fluid-foundation system on rolling bearings with a non-linear characteristic based on the method of complex amplitudes and harmonic balance has been developed. Non-linear equations of motion of the rotor-fluid-foundation system are derived, and analytical methods of their solution are presented. Frequencies of fundamental and ultra-harmonic resonances are determined. The intervals between self-oscillation frequencies are estimated. The dependence of amplitudes on the amount of fluid in the rotor cavity, the mass of the foundation, linear imbalance, the value of the stiffness coefficient, and the damping coefficient is shown.

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“…Assuming that the rotor and the foundation perform harmonic oscillations, we seek the solution of the system of equations (4) in the form [20,21]…”

Section: Nonlinear Forced Vibration and Self-oscillations "Rotor-fluid-foundation" Systemmentioning

confidence: 99%

Multi-parametric Dynamic Analysis of a Rolling Bearings System

Kydyrbekuly

Ibrayev

Ospan

et al. 2021

SV-JME

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“…In addition to the above mentioned role of fluid, rotor dynamics is also affected by a few other parameters, e.g. see [13] and [14], including the variation of inertial characteristics, nonlinearity and stiffness of supports and shafts, rotor disbalance and asymmetry [15], specific properties of a lubrication layer in case of plain bearings [16] and, especially, performance of rolling bearings [17] and [18], internal and external damping, and some others.…”

Section: Introductionmentioning

confidence: 99%

“…Ideally, dynamic stresses between the rotor and bearing supports and consequently induced vibrations disappear provided that the rotor principal inertia axis coincides with its axis of rotation. In this case, some of the important bearing properties, including nonlinear deformability, are ignored [18]. However, at higher speeds the effect of bearing nonlinear deformability becomes essential.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Vibrations of a Rotor-Fluid-Foundation System Supported by Rolling Bearings

Kydyrbekuly

Khajiyeva

Ybraev

et al. 2016

SV-JME

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A generalized dynamic model taking into account coupled vibrations of a rotor-fluid-foundation system, linear eccentricity, damping, and rolling bearing nonlinearity is developed. The nonlinear equations of motion are formulated and analysed. Forced and free vibrations of the system are investigated. Peculiarities of the dynamic behaviour are revealed, including properties of vibration frequencies and amplitudes. The obtained results have the potential to be implemented in the optimal design of modern industrial devices.

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Dynamics of a high-revolution compressor

Cited by 2 publications

References 0 publications

Multi-parametric Dynamic Analysis of a Rolling Bearings System

Multi-parametric Dynamic Analysis of a Rolling Bearings System

Nonlinear Vibrations of a Rotor-Fluid-Foundation System Supported by Rolling Bearings

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