National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Modal and spectral properties of the rotor on permanent magnet bearings
Kozánek, Jan ; Scopel, D. ; Svoboda, R. ; Šafr, M.
In this article the spectral and modal properties of the rotor on contactless bearings are investigated. The dynamic behaviour, especially the eigenfrequencies and corresponding modes have been calculated in two different ways, by the FEM ANSYS software in the Institute of Thermomechanics and by the program DYNROT in TECHLAB company. The importance of this analysis is supported by the fact that the first non-rigid body resonance is not far from the working rotation speed 40 000 rpm .
Resolvent of lambda matrix and Lancaster´s example
Kozánek, Jan ; Scopel, D.
This paper completes the mathematical modeling of a general linear dynamic system described by the n ordinary differential equations of order m .
Rayleigh´s field in dynamics
Kozánek, Jan ; Scopel, D.
The method of analysis of the mathematical models of non-conservative and non-symmetric dynamic systems is presented. We seek a global insight into dynamic properties of the investigated system with help of the Rayleigh's Field of Values in complex plane.

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