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This contribution describes basic groups of the optimized design of structures: deterministic (DBSO) and reliability based optimization (RBSO). The principle of solution [...]
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In deep vertical shafts, it is not possible to use common engineering measurement techniques like e. g. traversing. Therefore the transfer of geodetic networks consists o [...]
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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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This paper describes mathematic model of C-axis over mentioned machine. C-axis is controlled with position feedback and its mathematic model is determined for observation [...]
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5.
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Control design of rotating shaft levitated by active magnetic bearing is described in this contribution. Genetic algorithm is used to design controller parameters. Depend [...]
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6.
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Kalousek, Z.
The topic of the paper is the solution of the equilibrium equations for the fiexion of a transversally isotropic fibre and the discussion on the results for the materials [...]
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7.
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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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8.
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Poživilová, A.
Hyperelastic material model based on the logarithmic description is implemented in the finite element code. Procedure for the calculation of all the necessary quantities [...]
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9.
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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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In this paper the authors present the conception design, static analysis and technology of construction of the temporary steel structures used for strengthening of deep e [...]
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11.
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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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12.
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Učeň, O.
The contribution deals with problems of the creation of a mathematical model for centring the position of a ring in the course of rolling the ring. Ring centring is ensur [...]
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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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The paper presents theoretical and preliminary experimental results attempting to validate the modified nucleation theory for mixtures (published by Maršík et al. (2002 [...]
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15.
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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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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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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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18.
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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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19.
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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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The paper deals with a working prototype of a system for the active vibration control of journal bearings to prevent rotor instability due to the oil film. The controllab [...]
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22.
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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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23.
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This contribution deals with computation of stiffness and damping coefficients of aerostatic bearings. Model of bearings is based on Reynolds equation for compressible m [...]
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24.
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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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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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26.
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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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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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