1.
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Pečínka, L.
Analysis of the dynamic response of the beam under moving load and axial periodic force and with constant damping result in well known solution of Mathieu equation. In fa [...]
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2.
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The contribution deals with a mathematical model of bending vibrations of a slender flexible rotor, excited by unbalance when passing the critical speed. The analysed rot [...]
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3.
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Zapoměl, J.
The rotor systems consit of two principal components, of a rotor and of a stationary part, and the fluid film bearings are often used as coupling elements. As the clearan [...]
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4.
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The physical model of two cylinder hydraulic damper is composed from several groups of equations, which describe: a) the dynamic equilibrium of the forces loading the val [...]
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5.
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These problems were solved in past by Reynolds equation, which assumed a thin and a circular gap. A modification of Reynolds equation, a presumption of its derivation and [...]
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6.
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Engineering structures subjected to dynamic loading are often equipped with special devices proposed to suppress adverse motion. However, these installations are often d [...]
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7.
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Abstrakt: The procedure based on a traditional genetic algorithm (GA) is demonstrated on the price optimization of a vibrating block foundation. Unbalanced rotating mass [...]
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8.
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Zapoměl, Jaroslav
Abstrakt: Properties of fluid film bearings are significantly influenced by the shape of the cross section of the holes in the bearing shells. In computational models the [...]
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9.
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This paper deals with the methodology of the modelling of rotating shafts with flexible disks. Rotating shafts are modelled as one dimensional continuum on the basis of [...]
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10.
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The paper deals with the numerical simulation of a turbulent compressible fluid flow through the two-dimensional model of a gap caused by the incorrect contact of screw [...]
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11.
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Zapoměl, Jaroslav
Abstrakt: Rotors belong to the most frequently used components of machine devices. In a number of cases they are coupled with the stationary part through hydrodynamical b [...]
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12.
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The paper deals with the modelling of balancing machine vibration and the identification of the stiffness and damping coefficients of oil-film bearings. The real balancin [...]
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13.
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The paper deals with the modeling and evaluation of stability conditions of the balanced rotating system with rigid discs supported on two anisotropic hydrodynamic bearin [...]
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14.
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Ferfecki, P.
For the purpose of efficient diagnostics of fault conditions the influence of transverse fatigue crack on dynamical behaviour of a rotor system supported by active magnet [...]
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15.
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The tilting pad bearings are very often applied in high speed rotating machines. The exact solution of bearing characteristics, including the motion of tilting pads, is v [...]
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16.
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The paper deals with numerical computations of viscous incompressible fluid flow in glottis described by Navier-Stokes equations and discretised by the finite element met [...]
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17.
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The vibration amplitude of rotors excited by imbalance can be significantly reduced if damping devices are inserted between the rotor and its stationary part. To achieve [...]
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18.
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The condition of stability of steady flow in rotationally symmetrical area is presented in the paper. The governing equation is Navier-Stokes and the continuity equation [...]
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19.
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This contribution deals with computational modelling of static and dynamic analysis of journal bearings. In this contribution a new theoretical approach to the modelling [...]
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20.
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The contribution deals with computational modelling of static equilibrium position of centre of the shaft under the cavitated and uncavitated journal bearing. There are c [...]
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21.
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This contribution is consider with computational modelling of oil film flow stability in long lemon, offset and lemon-offset uncavitated bearings. In this contribution is [...]
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23.
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The accuracy of numerical solution of fluid dynamic tasks depends on both the geometrical and functional discretization. The paper deals with an applicability of high ord [...]
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24.
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One possibility how to decrease lateral vibration of rotors excited by imbalance of the rotating parts is to couple the shaft with the stationary part through squeeze fil [...]
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25.
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One of the possibility , how to reduce amplitude of transversal vibration of rotors is to put together their rotating and no-rotating part by the squeeze film dampers. In [...]
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26.
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One of the possibility, how to reduce amplitude of transversal vibration of rotors is to put together their rotating and no-rotating part by the squeeze film damper. This [...]
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